Hi Ruth, it's great to meet you. So much info has come to light after I posted this thread almost 6 years ago. Your late husband would be my late grandfather's distant cousin I believe. About the dates you mention, I have some that I believe will be more certain.
Samuel Mansfield Bay was 1811-1849. He was attorney general at MO and one of Dred Scott lawyers. His father was Thomas Bay (not sure about the Presley) and was 1779 - 1836. His father John Bay was a revolutionary soldier, I visited his tomb at Claverack County, NY. Along with him are other members of the family. Whatever you have I'd really appreciate you sharing, and be happy to share what I have as well. Enrique Bay (email@example.com