I am interested in infomation on Molby Stewart B:1815 Sligo, Ireland. Immigrated to Canada 1835 and Died 1887 in Blenheim, Oxford co. Ontario Canada.

The Tithe Applotment books, searchable online, have only one Malby Stewart in Sligo in 1833 - probably your man, or his father.
He's not in the Griffiths Valuation in 1857, also searchable online, which ties in with his emigration.

Also check out irishroots.ie - there are Stewarts being born around his time. Stewart is probably a Protestant name which means you are in luck as records in these churches can go back many years before Catholic ones.

THANK YOU! I was at a lost for figuring out how to locate info in Ireland, I am in the US. Your information is so appriciated. Kathy