WW2 POW and civil internees in India

I am a new member, primarily interested in the mails to & from civil internees & POWs in British India in WW2.
I have been examining letters from POWs to prove which camps held Italians and Germans.
I have found letters from Italians in Italian to/from Italy and one POW record card proving Italians were in each of the known 29 camps except No.18 & 21.
I have not found a single German letter to or from a POW in India.
I have seen letters from German civilian internees
Please will anyone with such material kindly send scan(s) or direct me to relevant literature?
All help will be gratefully acknowledged.
Many thanks
David (dumblescottage@pobroadband.co.uk)
I have been examining letters from POWs to prove which camps held Italians and Germans.
I have found letters from Italians in Italian to/from Italy and one POW record card proving Italians were in each of the known 29 camps except No.18 & 21.
I have not found a single German letter to or from a POW in India.
I have seen letters from German civilian internees
Please will anyone with such material kindly send scan(s) or direct me to relevant literature?
All help will be gratefully acknowledged.
Many thanks
David (dumblescottage@pobroadband.co.uk)