Mission statement: 
‘Audiendo ad terram’: Listening to the Earth

The Institute exits for the purpose of exploring, recording and interpreting geological sonic phenomena in the British Isles and sovereign British territories worldwide.

For the purposes of this mission statement, ‘sonic geology’ shall be defined as the emerging, experimental science derived from the empirical analysis of subterranean sonic phenomena, and the tapping of historical sonic substrata for the release of revelatory data. 

The Institute aims to:

1: Be the leading voice for sonic geology and an authoritative source of sonic geology information for the advancement of sonic geology and the benefit of humanity;

2: Provide effective programs in support of the sonic geology community and the conduct of sonic geology;

3: Collaborate with international sonic geology societies for the advancement of science, science education and the science community;

4: Cooperate with international sonic geology societies, to promote sonic geology, to support sonic geologists worldwide and to foster international collaboration;

5: Promote an active, engaged and diverse membership, and support the activities of its units and members.



As the NISG have visited many Sounding Spaces in the course of our investigations*, we have decided to instigate a coding system for the sites we have visited and documented. These are listed below. We will start publishing short field notes (including geological information and historical background) in advance of our investigations at each site in due course.

CODE    Location
001     Bincombe Down, South Dorset Ridgeway
002     Brimham Rocks, North Yorkshire
003     Avebury Stone Circle, Wiltshire
004     Burton Bradstock, West Dorset
005     Ringstead Downs, Norfolk
006     Ring of Brodgar, Orkney Isles
007     Ulsta, Yell, Shetland Isles
008     Little Bredy, South Dorset Ridgeway
009     Rushcombe, Corfe Mullen
010     Talbot Village, Bournemouth
011     Queens Park, Brighton
012     Wardrobe Museum Garden, Salisbury
013     Winchester Cathedral (Grounds)
014     Bell Meadows, Chelmsford
015     Bournemouth Lower Gardens
016     Castle Mound, (Higgins Museum) Bedford
017     Greenwich, St. Alfeges Park, London
018     Wrotham Park, Hertsfordshire

019     Queens Gardens, Kingston Upon Hull

*There are several sites which have been visited pre-systematisation on a more 'ad hoc' basis. Some of these sites have been visited multiple times, namely Bincombe Down on the South Dorset Ridgeway whilst other sites have been less fruitful on investigation (the small port of Ulsta,  on the Isle of Yell in the Shetland Islands being one such site where adverse weather conditions mitigated against ourselves and our monitoring apparatus).




GEOLOGY: Ice, river, sea and storm.

NISG field experiments in the East Riding of Yorkshire, and in Hull and Holderness in particular, have lifted the lid on the role of water as a stimulus and primary engine of sonic eruption in this area.[1]

The plain of Holderness and the Humberhead levels both owe their present geological form to the Quaternary ice ages, when ice fields formed on the higher land and immense glaciers crawled inexorably down the main valleys, scouring material from the valley sides and depositing it as the climate warmed and the ice melted some 14,500 years ago.

The landscape around the Queens Gardens sounding space is dominated by deposits of till, boulder clays and glacial lake clays. Peat filled depressions (known locally as meres) mark the presence of long-lost, ancient lake beds in the area.

At the southern limit of the ice was an extensive lake, Glacial Lake Humber, which later filled with clay sediments up to 20 metres thick. These were slowly overlain by peat deposits, in which can be found the remains of a huge buried forest.
The geology of the area runs in bands, with a chalk layer at Flamborough in the North, Boulder clay or till (laid down in the last ice age) to the south and river deposits in the Humber Estuary.
Because the clay is a weak mass of particles and boulders it erodes more rapidly than the more resistant rock of chalk in the north. Rain and rivers also wash and reform the land in a constant cycle, releasing historic sound and creating a sonic porosity that is unrivalled in the UK.
The sea is also the sonic geologists friend in this area, its tidal rhythms setting up repeating sonic wavelengths in the substrata that can stimulate sonic eruptions many miles inland.
Holderness is the number one place in Europe for coastal erosion, and in a stormy year waves from the North sea can remove between 7 and 10m of coastline, making it one of the fastest-eroding coastlines in EuropeThe coastline starts with blowholes, stacks and stumps at Flamborough, and culminates with Spurn Head, a very large spit that runs across part of Humber Estuary.
The rich fertile land of the inland area around Hull has also been extensively drained and irrigated, with numerous large agricultural watercourses dug into its rich clay soils. As the sea devours the land it releases sonic phenomena that travel along these watercourses, allowing us to listen in on the ghostly echoes of as many as 30 lost towns along the coast.
These include the submerged farm village of Wilsthorpe, mentioned in the Domesday Book, the drowned hamlet of Hartburn at the mouth of the great Earls Dyke watercourse, the ridge and furrow agricultural system of Monkwell, and the church settlement of Sisterkirk, where, on the night of the 16th February, 1816, after a storm of unusual violence, the church was washed down the cliffs, and coffins and bodies were strewn upon the shore below.


The Sounding Space lies on the porous Boulder Clays of the Humber Estuary, and until 1930 Queens Gardens was filled with the waters of Queens Dock. As the dock was not completely filled in when it fell from commercial use, the gardens are largely below the level of the surrounding streets and buildings.

This means we are listening below general ground level, closer to the source of the sonic phenomena, a fact that greatly enhances the already impressive powers of our Ear Trumpet technology.

The subterranean nature of the site also creates a sonic funnel that collects local proto-historic phenomena, amplifies them and makes for some fascinating listening, although one should always be careful of potential surge conditions that might lead to embarrassing ossicular responses.

The location of the busy wharf on this site explains sonic phenomena such as industrial noise, melodic echo-type phenomena associated with work and drinking songs and some conversational activity. Queens Dock was surrounded corn mills and seed and fish processing plants, and the area was an important centre for the whaling industry.

Sonic eruption in this area may therefore be explained by the extensive disruption to the ground that has taken place in this area over the years. Queens Gardens themselves are an excellent example of landscape re-design by the prominent architect Sir Frederick Gibberd, and Hull was heavily bombed in WW2 when The Hull Blitz of 1941 killed around 1200 people and destroyed much of the town.

Large ground interventions have therefore defined the place, from defensive structures such as the town wall and moat, to the creation of the dock and expanding trade, to marine technology and practices rendering the dock redundant, the creation of the public gardens, and post war regeneration in a modernist landscape style by a celebrated architect.

The NISG team believe that the extraordinarily large amount of recent building work in the environs of this park and the repaving of the entire city-centre has stimulated conversational, melodic, ambient and proto-historic sonic phenomena through its disturbance of the underground strata. This fortunate occurrence offers NISG an opportunity to record and analyse a significant eruption event.

Most of the buildings around the sounding space are post-war, apart from the south east corner where there survives a block of Georgian and Victorian buildings fronting Lowgate, a Georgian Bond Warehouse fronting Guildhall Road and the offices on the corner of Quay Street, all grade 2 listed buildings. The original old town walls lie to the south edge of the site.

Kingston-Upon-Hull was a key territory in the early part of the English Civil War due to the large arsenal in the city. The 1642 Siege of Hull was the first major action of the English Civil War, and saw the town and surrounding area flooded when attacking Royalist forces smashed sluice gates and river defences on The River Humber. Faint echoes of battle are often detected in the sonic profile of the area.

NOTE: Subterranean sonic phenomena have been detected in this area by NISG members, which might offer a rational scientific explanation for longstanding local folkloric reports of music from below ground, the sounds of swords, minstrelsy and incantation.

The sounding space is very near to the statue of William Wilberforce, the slave trade abolitionist. Wilberforce was born and educated in Hull, and elected as MP for the town in 1780, before becoming MP for the County of York in 1784. His profound Christian faith motivated his political life and led to him becoming the leading opponent of slavery in parliament. His campaign work contributed to the abolition of the slave trade in the British Empire in 1807 and of slavery as an institution in 1833.

[1] (See: Lathenby, B (2016) Getting Wet for Sonic Geology – Sub Aqua Investigations at Spurn Head Spit, Journal of Aural Investigation, 6:2, pp135-212)

A Statement on Europe

To our Fellow World Citizens, European Compatriots and Dear Friends, 

the NISG is committed to exploration, discovery, and warm relationships; even in somewhat chilly times.

We are scientists without borders, keen to explore new sounding spaces in International territories, particularly within our great continent. We feel sure astonishing discoveries can be made and wish to extend our hope that divisions created by natural – and man-made – disasters may be overcome by the good in humanity.
Wish best wishes for a peaceful future where human achievement knows no bounds.

Dr. Stella Barrows
President, NISG

National Institute for Sonic Geology


Wrotham Park (pronounced Root-am) is an 18 bedroom house set in a 300 acre estate. It was designed by Isaac Ware in 1754 and built by Admiral John Byng, and is still owned by the family. Byng was Court Martialed in 1757 for negligence which provided the occasion for Voltaire's famous quip: “Dans ce pays-ci, il est bon de truer de temps en temps un admiral pour encourager les autreswhich translates as "In this country it pays well, from time to time, to kill an Admiral to encourage the others". It is one of the largest private houses within the M25 corridor.

The pleasure grounds are situated in Hertsmere, a local government district and borough in Hertfordshire, based in Borehamwood.
Hertsfordshire, it cites on the inward boundary is the ‘County of Opportunity’ and it certainly is opportune for the NISG to be invited here, as the Institute has not yet experienced sonic eruption in this district and it is exciting to discover a new and rich area for investigation.

Wrotham Park lies between Potters Bar 1.5km to the north and Barnet 1.5km to the south it is bounded by public roads, with the A1000 Great North Road to the east, Dancers Hill Road to the north and Kitt's End Road to the west. Two broad, shallow valleys cross the park, rising from west to north-east and west to south-east respectively, from a lake on the west boundary. The house stands on a promontory between the two valleys. We might suggest that this landscape acts as something of a funnel or channel for rich sonic deposits.

The immediate setting is rural, with a town development close by to the north, south and south-east. The M25 motorway runs roughly parallel and 500m north of the north boundary. Long views extend westwards from the house and surrounding grounds across the adjacent countryside. There are mature oaks surrounding the sounding space, and a lake at the bottom of the park. The garden is crossed by a network of paths, with a serpentine lake at the centre. The area is laid out with sunk flower gardens, picturesque tree plantings, collections of exotic plants, shrubberies and ponds. In the environs of this parkland we have heard conversational, melodic, ambient and proto-historic sonic phenomena.
We were alerted to the emanations by Robert Byng a direct descendent of Admiral Byng who lives in the house and has managed the estate since 1991.

Originally part of an estate known as Pinchbank (also Birchbank), first recorded in Middlesex in 1310 and owned in the 17th and early 18th centuries by the Howkins family, the property passed to Thomas Reynolds, a director of the South Sea Company, who renamed the estate Strangeways. His son, Francis, sold the property to Admiral John Byng who had the house rebuilt by Isaac Ware in 1754. In 1883 a disastrous fire broke out in the house and it was gutted, although it burnt slowly enough to remove the valuable contents of the house as it burnt. The interior was re-built to exactly the same design.

We are unsure of the reasons for this forceful eruption event, although some of the NISG team have been working on a thesis that frequent loud music or parties may trigger or stimulate sonic venting.


The soil is mainly London Clay and beneath the clay lies a thick layer of chalk, which is exposed to the west of the Barnet by-pass and also in the valley of Mimmshall brook, where, resting on it, is a narrow band of Reading Beds. On the highest land are patches of pebble gravel, rarely more than 10 ft. thick. They cover a narrow ridge from Barnet to Bentley Heath, a wider area along Potters Bar High Street to Little Heath, and parts of Mimmshall wood, Dugdale Hill, and Dyrham Park. Other drift deposits include boulder clay in the north and north-east and alluvium fill in the valley of Mimmshall brook.


Considerable traces of Roman Road found at the boundary of the estate, and then later Saxon settlement. It is also near to the site of the Battle of Barnet, a decisive engagemet in the Wars of the Roses fought in 1471.  Historians regard this battle as one of the most important clashes in the Wars of the Roses, since it brought about a decisive turn in the fortunes of the two houses. Edward's victory was followed by fourteen years of Yorkist rule over England. In our early research phase we perceived sounds of proto-historical battle emanating from the ground beneath our feet.

Greenwich, St Alfege Park #017

St Alfege Park/Churchyard


Greenwich has one of the richest histories of any city or borough in Britain. Occupation and activity in the immediate area can be traced back thousands of years, from the construction of the earthworks by the Danes, to the Royal Palaces and the seafaring activity from the Roman period through to today.

The Sounding Space lies near to the great tidal River, the Thames and Greenwich itself is recognised as having not only great National significance, but as is a World Heritage Site.


St Alfege Park is situated on part of the former burial land of St Alfege Church. The churchyard saw burials here for fifty years from 1803 to 1853 and the western part of the ground containing an old mortuary was converted into a public park land in 1889. Many graves and tombstones exist still within the gardens. Recent building work in the environs of this park has stimulated conversational, melodic, ambient and proto-historic sonic phenomena through its disturbance of the underground strata. This fortunate occurrence offers NISG an opportunity to record and analyse one of the most important field sites in Sonic Geology in the UK for the last 50 years.

There have been settlements in Greenwich since Roman times, the Danes raised earthworks here in the 11th century and it became Crown property in 1427. Although Greenwich was a sizeable and wealthy town in the 14th and 15th centuries, by the end of Queen Elizabeth I's reign the area outside the Palace was becoming rundown. St Alfege's steeple was in bad repair and a severe storm in November 1710 led to the collapse of the roof. Queen Anne, the patron of the parish, was petitioned for a new church and in 1711 the new church of St Alfege (designed by Nicholas Hawksmoor) was re-consecrated on 29 September 1718. Hawksmoor's tower was not built due to lack of funds, and instead the old tower, which had escaped storm damage in 1710, was re-cased to designs of John James of Greenwich in 1730. Badly bombed on 19 March 1941, the church was restored in 1953.

NOTE: Thomas Tallis, described as 'the father of English Church music' was a Gentleman of the Chapel Royal from 1540 to his death in 1585 and is buried in the Chancel, it is said that he wandered the environs of the church ground whilst composing.

Greenwich Park is made up of grassy hills and valleys covering some 183 acres of land. The park stretches out from the level plateau of Blackheath in the south, then drops over 30 metres (100ft) before levelling out again on the north side towards the Thames. During the Cretaceous period, London was submerged by water and chalk was formed. The Paleogene period from 65 to 23 million years ago saw the movement of the African tectonic plate northwards, which collided with the European tectonic plate. This movement created a fault line around the Greenwich area which lies about half a mile south of the Thames and runs from east to west creating this hilly landscape in Greenwich.
Greenwich Park sits very close to the Sounding Space and is divided in two by a steep-sloped escarpment that runs from east to west. The gravel terraces of the southern half of the Park rise to heights of up to 45m above sea level.

Alluvial landscapes are rich for the formation of sonic emissions.
The London Basin was formed during the Paleogene period from sedimentary rocks which were deposited when the land was submerged under the sea. Chalk was laid down first followed by sand, gravel, silts and clay. The gravelly and sandy soils found here are free draining overlying acid rocks, and is a common feature of many parts of London, and so becomes an integral part of lowland heath landscapes, commons and parklands. This soil type is well-known for it’s sonic porosity.

The flow of the River Thames dropped Kesgrave Sands and Gravels along its massive ancient river bed, and has transported puddingstones and sarsens, quartzes and gravels, all of which are well-known for their ability to trap sonic phenomena within their crystalline structures, a phenomenon explained by Dr Stella Barrows in her seminal paper Rocking Radiophony – Crystalline Induction in Sonic Geology.

One would assume that this were enough to explain the abundance of proto-historic musical, industrial and conversational sonic phenomena found in the St Alfege Park area, such as the ‘singing’ of the ancient riverbed, the ‘sonic sermons’ recorded from beneath the nearby churches, the repeated campanological bell patterns, the geological historical echoes of cricket matches and ancient battles.

It is suggested that this geological fault-line, and the ‘London Basin’ acts to focus subterranean sonic phenomena in the manner of a ‘speaker cone’, allowing for detection of Deep Sound by means of NISG Ear Trumpet technology, and that this should be the focus of NISG investigations in the area.

There is a great deal of building work which has taken place during the past few months, and it has been suggested that this construction work (which has involved deep earthworks) may also have released detectable sonic phenomena, in the manner of repeated echo-type, induction, and auricular events.

NOTE: Sonic Geology clearly benefits from the subterranean disruption caused by such commercial building activity in terms of the release of new data and the stimulation of hitherto unknown Deep Stratum sonic activity.
However, some experts in the field also believe that the phenomena themselves could be permanently erased from the geological sound profile by such activity. A recent, internally divisive, NISG motion led to a slim majority decision that the Society should express its concern to the relevant authorities on this issue.

NOTE: Subterranean sonic phenomena have been detected in this area by NISG members, which might offer a rational scientific explanation for longstanding local folkloric reports of music from below ground, the sounds of swords, minstrelsy and incantation.

NOTE: A key research question surrounds the extent to which archaeological objects may emit charged sonic signals that have been stored within them as a result of human possession and transportation.


National Institute of Sonic Geology

Dr Stella Barrows, (BsC, PhD, NISG)

Born in Dorset and educated at the Sherborne School for Girls, Stella Barrows first became interested in notions of subterranean resonance when, as a girl, she met the pre-eminent Archeologist, Sir Mortimer Wheeler who was then head of the Institute of Archeology. Sir Mortimer was conducting his (now famous) excavations of the Iron Age Hill Fort of Maiden Castle and nearby tumuli sited on the South Dorset Ridgeway. Upon meeting her, Sir Mortimer invited Stella to assist on the dig. Although this was during the heady time of National ‘Hill Fort Mania’ Stella’s attention drifted, and she started to become enthralled by the older Bronze Age Bincombe Bumps (sited near Weymouth, also on the South Dorset Ridgeway), a series of six burial mounds which local myth suggested emit music at midday if listened to carefully enough. Stella experienced the melodic phenomena herself, but swiftly dismissed notions of supernatural or folkloric explanation for these ‘singing barrows’ and started to theorise about how sound might have become trapped within the bedrock of the British Isles. Her conclusions around the specific geology of place being fundamental to these emissions led her away from her first love of Archeology into an interest in the formation of the earth itself.

Stella subsequently attended University College London and graduated with a first in Geological Science. Her postgraduate thesis written on ‘Sonic Resonance in Neolithic Topography’ was written under the inspirational tutelage of Dame Trinity Arthurson who has provided a constant source of encouragement.

During the war, Barrows found employment working on the development of Sound Navigation and Ranging (SONAR), focussing on the impact geological configurations and seismic events have on the density and resonance of underwater sounding. Post-war, her passion for sonic emissions reignited and she decided to dedicate herself fully to the nascent fields of Sonic Geology and Sonic Investigation. Stella quickly established the ground-breaking National Institute of Sonic Geology (NISG) of which she is founding member and President. Since its formation, the NISG has grown to include several enthusiastic field operatives and a permanent team who Stella affectionately refers to as ‘Sonic Investigators’, including Roger Millington, Beatrice Lathenby, Hildegard Brunel, Mavis Collingwood and Percival Denny.

Although most of Dr Barrows’ time is taken up with her passion for NISG she occasionally dabbles in landscape painting and learning the Piano Accordion in her home county of Dorset.

Roger Millington, NISG
(Extract from Sonic Geology: Pioneers of a radical new science? The Times Educational Supplement)

Roger Millington’s interest in geology began as a boy, when he read Journey to the Centre of the Earth by Jules Verne, and developed a passion for digging holes, much to the annoyance of the gardener at the Norfolk vicarage in which he grew up.

Millington left school at 14, with a solid devotion to mechanical tinkering and outdoor activities, but no qualifications to speak of. After an extensive hands-on practical training as a mining engineer in the South Wales Valleys, where he developed a love of colliery brass band music, he enlisted in the Corps of Royal Engineers as a Sapper. War soon intervened, and he found himself involved in the dangerous tasks of military tunnelling and the preparation of defensive earthworks. This involved long hours underground amid the mud and horror of war, digging beneath enemy lines and listening carefully to vibrations from below ground that might indicate an imminent attack.
It was during one such mission that Millington had his first experience of geological sonic phenomena. Deep below ground on a Spring day in France, he found himself listening to the unmistakable sounds of medieval plainsong and the playing of spoons, as they oscillated within a large crystalline boulder around which he and his team were attempting to tunnel. Dismissing the experience as evidence of his slow slide into post-traumatic stress, Roger at first denied the preposterous notion that sound could be held in the Earth’s geology. He gritted his teeth, and plunged further into the jaws of international conflict.

The war was not kind to Millington, and eventually he was invalided out of the Army with shellshock and neuralgia, a shadow of his former self. He was shipped to a convalescent home in a former boys’ preparatory school at Seale Hayne, near Newton Abbot, where his recuperation centred on the restoration of a mountain of abandoned orchestral instruments that he had found in a dusty basement. Recovery was a slow and hesitant process. Peace and quiet, and gentle listening to the sounds of nature and light classical music were the order of the day.

All this changed when Dr Stella Barrows, president of the newly-established National Institute for Sonic Geology, arrived at Seale Hayne to investigate sonic phenomena that had been stimulated by the excavation of an unexploded bomb from the German Beidecker raids on Exeter. Encountering Dr Barrows as she sought to manage an aural upsurge behind the stables with only a battered Henley Audiophone in the way of equipment, Millington learned that the geological sonic phenomena he had experienced in the tunnels of wartime France were in fact geological reality. His world was turned upside down. What he had thought of as madness - sound emerging from the fabric of the Earth itself - was actually scientific fact. Barrows explained to Millington that the phenomena he had experienced had arisen from a verifiable feature of geology that could be empirically proven, catalogued and recorded, if only an appropriate form of reliable detection technology could be developed.

Invigorated by his epiphany, Roger joined NISG as technical advisor. He quickly turned to his basement of musical horns for inspiration, as he wrestled to find a method of improving the detection of subterranean sonic phenomena. Three days of frenetic tinkering led to the creation of the Ear Trumpet, and the detection and recording of the Seale Hayne phenomena.

Hildegarde Brunel (BsC, MsC, NISG)

Hildegarde grew up in Richmond Upon Thames not far from Marble Hill Park. Her parents were 
eminent Egyptologists and the young Hildegarde would often go with them on their archaeological 
digs. Hildegarde first became interested in audiology science when her Mother was pregnant with her younger brother Bertie and she would use a pinard horn to listen to her unborn brother's heartbeat. 

The Pinard Horn is still Hildegarde's preferred listening device and she recently published a short 
paper on its use in mathematically mapping sonic porosity on the glacier's in southern Iceland. 
Hildegarde briefly flirted with the notion of becoming an aviator before taking up a place at 
Cambridge to read mathematical science. Whilst at Cambridge she set up the (now disbanded) 
SLS (Secret Listening Society) – a group dedicated to the exploration of the aural architecture of 
the environment. After graduation Hildegarde was recruited to take up a post for His Majesty's 

Hildegarde became interested in sonic geology and the work of the NISG after reading of the ground-breaking discoveries of Dr Stella Barrows and shortly after Roger Millington was invited to 
deliver a lecture at the SLS in the development of ear trumpet technology. After leaving the secret
civil service, Hildegarde was delighted to have been invited to work with the NISG. She joined the team for the first time last summer at the Little Bredy Sounding Space.

A keen diver and a passionate baker, Hildegarde's speciality is lemon drizzle cake.

Beatrice Lathenby BsC, NISG

Beatrice is the only child of Dr Harold and Margaret Lathenby, renowned archaeologists. She was brought up in London in a house overlooking Regent's Park. Whilst playing in the garden as a child 
Beatrice heard conversational phenomena coming from the ground. When she told her parents they 
worried for her sanity and sent her to eminent child psychologist Dr Heideberger, but finding nothing wrong with her the incident was soon forgotten, by her parents. 
Beatrice gained a Bachelors degree in Geography from St Hilda's, Oxford University. She was employed as an air raid warden in her time there and was praised for her cool head and practicality. Beatrice was also in the ladies cycling and swimming club.

Whilst on a Geography field trip to North Yorkshire, Beatrice happened across Roger Millington at the Brimham Rocks Sounding Space, and was intrigued to hear about the work of the NISG relating it back to her childhood experience. She questioned her professors about NISG and sonic phenomena but was told that they were not a respectable scientific organisation, some even dismissed them as a bunch of fanatics, but undeterred Beatrice started carrying around a stethoscope borrowed from a friend studying medicine. She found a subterranean hum with what sounded like choral voices on the lawn of Queen's College and immediately sent for the NISG. Roger Millington arrived with his investigative equipment but was refused entry by the college. Roger told her about a new sounding space that they were investigating that summer on the South Coast and the need for strong swimmers to join the snorkelling team. Beatrice immediately volunteered and after graduating a few weeks later she joined the NISG down at Burton Bradstock.

Beatrice 'Flippers' Lathenby has been with NISG for two and half years and visited 8 sounding Spaces 
with them. She has published three papers: The Common Emission of Melodic Events in Alluvial 
Valleys, The Suspected methods of Seeding on the Southern Shore and Imprinting of Bass Frequency Sound Associated with the Movement of Glaciers all published in The Journal of Sonic Experimental  Geogolgy. She is Captain of the snorkelling team and has produced a pamphlet entitled Snorkelling tips for Sonic Investigators.

Percival Denny, BsC, NISG, 

Born and raised in Norfolk, Percival 'Plum' Denny attended the same school as the regions' other distinguished son and early amateur subterranean sonic enthusiast, Lord Horatio Nelson. Somewhat of a dullard, Plum bungled his way through his time as a border until he
was granted a scholarship to Oxford thanks to his skills as a wicketkeeper. Deft behind the sticks, Plum soon gained a reputation as one of the finest cricketers on the university circuit. Fame beckoned, and Plum was sent on a MCC Exhibition Tour to the Far East, with the purpose of spreading the popularity of God's Chosen Game (locals still talk of his majestic 136 against a Presidents XI in Kuala Lumpur).
However, it was on this tour that events in Plum's life took a
mysterious turn. Taking a day trip into the Himalayan Mountains, Plum disappeared. He returned three years later. Although rumours abound of what happened during his time in exile, very few facts have come to light. What we do know is: 

1) Evidence suggests that Plum was almost certainly completely silent for these three years 
2) During that time he developed an incredible ability to listen to the smallest of sounds from the longest of distances 
3) There is some talk of the influences of a shadowy Far Eastern Organisation dedicated to practicing the ancient art of subterranean listening mythologies
4) Plum never played cricket again.

On his return to England Plum switched courses at Oxford and transferred to study Physics, writing a seminal paper on "Ancient Eastern Philosophy and it's Influence on Transverse Waves". Whilst
many consider Plum to have 'gone native', his work attracted the
attention of Dr Stella Barrows and he was asked to join the NISG, a
position he still holds.

Plum is a passionate campanologist and owner of a Heavy Goods Vehicle (HGV) driving licence.

Mavis Collingwood BsC, NISG

Daughter of Dr Arthur and Phyllis Collingwood, Mavis moved to Aberdeen as a child after her parents were transferred to Aberdeen Royal Infirmary to assist with the development of a research partnership with Aberdeen University.
Mavis developed a keen interest in fishing, and frequently spent her spare time at the banks of the River Dee. However, she soon learnt that her fascination was less with what she caught, and more with the unexplored environment with which it came from. Even as a young adult, Mavis had recurring dreams of exploring a world underwater, and subsequently became isolated as her fascination with unseen places took over her ability to socialise with others in the environments within which she spent her time.
It was her mother who encouraged Mavis to take a more formal and educated interest in marine biology in order to overcome her isolation and to enable her to share her fascination with others.
Mavis graduated from Aberdeen University with a degree in Marine Ecology, and went on to write the ground breaking paper Familiar Patterns for Community Structures: a Study of Eastern Coastal Areas in Scotland.  During the war she assisted with the tracking of allied U-boat packs, helping to break and read German Naval Enigma codes. Although she became an eminent name in her field, Mavis soon became eager to learn more about other unseen environments. Her discovery of sonic geology happened purely by chance, after finding a copy of the Journal of Sonic Experimental Geology in the South Coast Centre for Snorkelling and Diving, which she later discovered belonged to Beatrice Lathenby.
It was at a conference on sonic phenomena that Mavis first met Dr Stella Barrows, becoming captivated by her talk on methods of investigating historical sonic substrata, which reignited Mavis’ childhood, dreamlike, fascination for occurrences in unseen environments.

Her enthusiasm and expertise have led to her becoming a core member of the NISG and she is thrilled to have been appointed on an upcoming exploration of sounding spaces across the British Isles.