My 3rd great grandfather James Blakemore/Blackmore/Bleakmore (1768-1853)was a son( or first son) of Caleb and Cathrina. I think he was born in William township in Northamppton co. PA.. He married a Mary Snider (1781-1852)...Mary might be the daughter you mentioned of Ester Blackmore Snyder and Anthony Snider?I recall that I had found a Michael Snyder in the same town as Mary and James in the 1850 census in Moundsville Marshall co. W.V. and assumed that Michael was a brother to Mary. Are you a Snider researcher? Thank you for the info you posted...you are one of the few people I have found on the internet ( in the last 14 years)that has had other relevant genealogy info that has helped me. m.j.