James, Have you checked the Federal and State censuses? That is the place to start. I am looking for a Sally Thomas from Otsego County NY? who married Benjamin Ingalls. She was the second wife, after Margery Cass died. Benjamin died about 1830, probably in Henderson, Jefferson county, NY. Sally (Thomas) Ingalls may have died in Michigan after 1835, where she may have moved with her step-son, James Ingalls. She may have re-married or gone back to NY state. Jay Ingalls