Hi there - I know this is a super old post and my reply is possibly a strange one.... but I have been working on looking for my great great grandfather Thomas who married Ann, and had my grandfather William Thomas in m'how india! Coincidently there are 2 born between 1870 and 1871 and both have parents Thomas and Ann! The Ann painter isn't my great great grandmother though and they moved to NSW. I Believe my great great grandmother is Ann Beard and they were Royal Artillery. I still have the other Thomas in my family tree as a floating branch and believe I found a few children also!
I'm trying to find military records still but I know my Thomas and Ann moved back to Portadown and passed away there! I too would like to see records of their journey to India but the only military pension record I see for my great great grandfather indicates he served 17yr 1 month in India and a year in Canada!