Great stuff, BB - we are very fortunate that you have been prepared to go to such lengths to present the exploits of John and his colleagues for our delectation, and just so sorry to hear that the logbook - and of course the stamp collection cannot be found. One can only hope that they will.
On a different tack, I can't help wondering if V (AC) Squadron were ever fortunate enough to hear about the derring-do of a previous generation of Sentinel pilots.
Jack