Ancestor Bernard Martin Born 1831

I've been trying to find accurate birth information on my ancestor Bernard Martin and I think I finally found it. He was born in 1831, Elphin, County Roscommon. He immigrated to America in 1834 so he was very young when he lived in Ireland. After searching, researching, and researching for Roman Catholic Baptism information for Elphin, County Roscommon, I finally found a Bernard Martin baptized 03 Oct. 1831. my previous searches showed a Bernard Martin born in 1836 but none in 1831. Why this didn't show up until now I don't know. His parents were John Martin and Margret Murry, so now I need to research them. The sponsors for the Baptism were Bryan McCormick and Cath Gilluly. I guess the lesson learned is to never give up searching.

Until I find the immigration information I won't know for positive sure, but I'm pretty sure this is correct. Does anyone know of John Martin, Margret Murry, Bryan Mccormick or Cath Gilluly from the 1800's? What was going on in the Elphin area around 1831-1834 that would cause people to leave? Anything specific or just a quest for a new future. Any insights would be welcome.