Harry Green Dunkley - Chatauqua Co., NY

I am searching for any information regarding my gggrandfather, Harry Green Dunkley.He was born 13 Oct 1846, probably in England, and emigrated to the US with two brothers around 1867.Family tradition says that one brother moved to Canada.Harry Green Dunkley married Ann M. Andrews in 1869 and later married her sister, Mattie L. Andrews in 1877.He lived for many years in Fredonia, NY, where he farmed and raised grapes.He died in 1934.I would very much appreciate any information.I also have further information to share.