Later, it was developed into a diving apparatus. After several private trials in the Thames they were having difficulty bringing the invention to the serious attention of the admiralty until they approached the Governor of the Greenwich Hospital, Admiral Sir Richard Goodwin Keats. Following that interview they were able to write to the Admiralty they would be proud to make a descent in their presence, now having a convenient vessel lying off the steps of the Royal Hospital Greenwich near the Admiral's residence, which vessel with the Governor's consent would be allowed to remain to await their Lordships' pleasure. The Admiralty had little option but to attend, and shortly thereafter official trials were undertaken at the Sheerness dockyard, and patents were obtained. The Deanes became full time divers.
