I know that my grt grt Grandad Samuel Blyth was in the British Army in India sometime in the 1840/50s. He was married to an Irish girl Fanny McEvitie from Belturbet, Co Cavan, Ireland. They ended up back in Belturbet but how can I find out about his army service in India? I have no idea of regiments - are there any records to indicate how they got there - presumably by sea. Family always thought that there was a connection to Bath. I have always presumed he was born about 1825/30.Thank you for any help!