I been trying to sort out Ganos in Hunterdon, New Jersey and believe this may be your James Martin Gano b. abt 1842. He d. 9 Nov 1895 in Manhattan, NY. I've attributed him to Holloway W. Gano m. to Liveria Johnston. His wife Vienna died in 1913 in Manhattan. Holloway's grandfather was Richard (1763) m. to Martha Beavers and his ggrandfather was William (1710) m. to Sarah. You should find James in his father's household in the 1850 in Alexandria, Hunterdon, New Jersey. You should definitely get a copy of his death certificate from the NY city archives which from my experience with NY death certificates will probably have his parents listed.