Peter
I think this may be 541017 Sgt. Clarence (?) Aitken R.A.F., formerly R.225913, attached to 17th Bomb Group, USAAF. He made a deposition to the United Nations War Crimes Commission after the war which contains details of his experiences, and notes that he was taken prisoner on March 21st 1942 at Batavia, available to download here:
http://www.mansell.com/pow_resources...RG331Bx945.pdf
Regards
Simon
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