Jack Sheppard (cave diver)

Jack Sheppard (31 March 1909 – 14 July 2001), born John Arthur Sheppard in Lewisham, Kent (south east London), was a pioneer of cave diving in the United Kingdom and a founder, together with Graham Balcombe, of the Cave Diving Group.

Jack Sheppard
Born
John Arthur Sheppard

(1909-03-31)31 March 1909
Lewisham, Kent, United Kingdom
Died14 July 2001(2001-07-14) (aged 92)
Known forCave diving

Life and career

Sheppard and Balcombe both worked for the Post Office as telecommunications engineers. They became rock climbing partners and while based in Bristol became interested in the caves of the Mendip Hills, particularly Swildon's Hole which they believed connected to Wookey Hole Caves. They proved this by putting dye into the water at Swildon's and seeing it emerge at Wookey.

Various attempts were made to enter these underwater cave systems using shore-based pumped-air diving suits, without much success. An initial dive in 1934 was unsuccessful and the first successful dive was the following year at Wookey Hole. They returned with improved equipment and succeeded in further exploration.[1][2] Sheppard constructed his own dry suit, incorporating an oxygen rebreathing system, and used this to make the first successful cave dive in Swildon's Hole on 4 October 1936.[3]

For the initial 1934 dive Sheppard and colleague Francis Graham Balcombe constructed the first underwater breathing apparatus for cave diving. This amazing contraption was constructed with recycled household items, including a bicycle pump and tobacco tin. It provided the means for the pioneering exploration of Swildon's Hole and other caves in Mendip. The bicycle respirator is composed of several key elements: rubber mouth attachment, a flexible hosepipe, bicycle pump and tobacco tin stopper, all held together with metal clips. It is a kind of homemade snorkel but designed to be attached to a pump to supply the air for underwater cave diving. The bicycle respirator can be seen at Wells and Mendip Museum.[4][5]

During his later life, Jack Sheppard was made Honorary President of the Cave Diving Group.[3]

gollark: I mean, there's no evidence of rainbow formation through this "peace and love" thing, but you can easily make rainbow-type patterns with a regular prism, or even just some plastic rulers.
gollark: I think the specialized optics would work better.
gollark: What's a "peace and love"? How do you recreate that in the lab?
gollark: Using specialized optics in some cases, or mist generation to recreate normal rainbow formation conditions.
gollark: There is actually research into artificial rainbow generation at small scales.

See also

References
  1. Burgess, Robert F. (1999). "The Wet Speleologists". The Cave Divers. Locust Valley, New York: Aqua Quest Publications. pp. 23–29. ISBN 1-881652-11-4. LCCN 96-39661.
  2. Buxton, John S. "The Cave Diving Group". CDG. Archived from the original on 31 October 2008. Retrieved 28 September 2008.
  3. "Jack Sheppard". Cave Diving Group. Archived from the original on 30 July 2007. Retrieved 29 December 2007.
  4. Farr, Martyn (2011). "Cave diving in South Wales". In Ford, Trevor D. (ed.). Limestones and Caves of Wales. Cambridge University Press. pp. 102–5. ISBN 978-0-521-16913-4.
  5. "Netherworld of Mendip | Wells & Mendip Museum | Wells". Wells Museum - Main. Retrieved 29 January 2020.
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