Thanks for your reply. But I had already found those details, and quite a bit more about their lives, after arriving in New Haven, Ohio. What is sadly lacking are the origins of the key figures -- Wales Thayer, Catharine Doyle(?)/Walker/Thayer/Standish, and Mr. Walker. Not a concrete clue about their origins. Wales was apparently born somewhere in Massachusetts about 1804; parents a complete mystery. Catharine was born in Ireland, about 1808, and may have had maiden name of Doyle, I think. When and how she came to America, and her parents, I have only theories. And Mr. Walker is a complete mystery. Catharine and Wales did have at least two sons (Nicholas was my great-grandfather), but I think there were likely an additional sibling or two, judging from census records. Records I have found and my family ties are all on ancestry.com -- as best I have been able to determine.
Any additional clues about the origins of any of the above, prior to New Haven, Ohio??
Mostyn Owen Thayer