I tried reading the 276 Squadron Summary of Events for 16 April 1943. My best guess on what it says (the text is hard to read):
Harrowbeer 16.4.43
Walrus ordered off from Harrowbeer on search 225 degrees 33 miles Bolt Head. Aircraft wreckage found on arrival at spot. Walrus landed among debris but only yellow oxygen bottles and lower half of an Irvin suit picked up. In the pocket of the Irwin suit 6 Bomb pins were found. Two boats seen 12 miles west of the position. Later in the afternoon, Walrus from “C” Flight Portreath ordered off on search 240 degrees 45 miles from Scillies. After searching, a dinghy containing 7 aircrew was found. Owing to rough seas?? and the fact that the Walrus would be unable to take off again with such a load, ?O? (SOS?) markers were dropped and the Boats were guided to the position. Walrus remained in position over the dinghy until all aircrew were transferred to the Rescue launch. This Walrus had previously been employed in the search which “B” Flight found the wreckage earlier in the day. At 21.00 hours this evening the Walrus from “B” Flight was airborne in a search for W/C O’Brien (Portreath Wing) who had been seen in his dinghy near the French coast. At 21.33 the Walrus from Portreath was ordered off on the same search and carrying out the search made landfall at Ouessant near Brest. Both these searches were uneventful, but W/C O’Brien was picked up by the M/G Boats early next morning.
The W/C O'Brien would appear to be the man discussed in this thread:
http://www.rafcommands.com/forum/sho...-April-16-1943