History 1930 - 1939
Balcombe and Sheppard first attempt Swildon's Sump 1.
Balcombe and Powell reach chamber 7, Wookey Hole, in a series of
dives in standard dress.
Sheppard passes Sump 1, Swildon's hole, using a home made dry suit
fed by a football inflator pump
Balcombe adds an oxygen cylinder to his home made B.A. and becomes
self contained. He passes Sump 2, Swildon's Hole
On to the next section.
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