CAMPBELL,Henry Michael

Hello all
I am looking for as much info as possible on my Great Uncle, who was one of many poor souls executed by the Japanese in Ambon in February 1942. I have general information on this event, but was wondering if there is any way to find out about the individual at all. I have been told that this Theatre of The War was hushed up quite a bit.
I have all his military details, but would really like to know more. Perhaps there is someone out there who's relative may have a diary or something to that effect. I also know that there are many books about this subject, but am unable to get my hands on any of them.
His name, by the way was Private Henry [Harry] Michael Campbell, born in Irish Town Tasmania, serial no VX31038 AIF 2/21 Btn AIF.
I believe he was member of the 'GULL FORCE' but have no proof of this. Any photos of The Ambon War Cemetery or Memorial would also be greatly appreciated. Does anyone know if there are photos of inidividual graves or any kind of marker or memorial to the individual. I know this is alot to ask. Thanx to all for any co-operation
regards christine - sydney- down under