My ggrandfather was Thomas J. Murphy b. 1865 Potsdam, New York. He had a younger brother John Jr. b. 1870. His parent's were John b.abt.1820 in Ireland and mother Elizabeth b. abt.1835 in Canada. I got this info from 1870 New York census. How can I find out more about these Murphy's. I was told Elizabeth's maiden name was Brown. I have all the direct decendent's from Thomas to my mother. But there has got to be more then just this line.
I'd appreciate any help.