My 2 ggrandfather, James Holahan (born ~1831 in Ireland) came to New York in 1866. His wife and son, Ellen (born ~1834 in Ireland) and George (born ~1860 in Manchester England) arrived in 1868. I believe they left from Liverpool, but I haven't been unable to find any passenger lists with their names to confirm that information. I have searched Ancestry and Family Search. Are there any other sources that I should research that would help in my search?