On June 1, 1791, James Mott of Washington executed a mortgage deed to a John Tallman "of Flushing" in the amount of 250 pounds, the subject property being 100 acres bounded east by Jonathan Weller and west by Joseph Jenkins. Buck & McDermott, "Eighteenth Century Documents of the Nine Partners Patent, Dutchess County, New York." I presume the propery is in Washington, although the deed does not say so explicitly.
I think there are two John Tallmans in Dutchess in the late 1700s, one who lived in Dover with a wife named Ruth who died in 1830, and the other the one "of Flushing" who owned property in Washington.
Another younger one, the Hon. John P.H. Tallman, is profiled in "Commemorative Biographical Record of Dutchess County." (1897). The opening paragraph merits attention. He was born in Washington, Dutchess on March 19, 1820. "His ancestry for several generations had been residents of that county. Darius Tallman, his great-grandfather, emigrated from Nantucket, married Miss Southworth, and settled on Chestnut Ridge, near where the place in later years Mr. Benson Lossing lived. . ."
Well, just the first paragraph is already interesting. His great-grandfather would be Darius4(Darius3) Tallman, and "Miss Southworth" is Rebecca Southworth of Little Compton, RI, whose father Fobes Southworth moved the family to Dutchess in the 1740s. It looks like the children of Darius3 Tallman and Sarah Wilbur were Darius4, Britain4, Meribah4 and David4, with all three of the males ending up in Dutchess. And Nantucket. As you probably already know, the town of Hudson was formed by several families (Jenkins, Coffin, Folger, etc) from Nantucket. In this regard I might explain that "Dartmouth" MA in those days would have included what later became New Bedford, a large whaling port with all kinds of ties --- commercial, religious, family --- to Nantucket. So I am skeptical that Darius3 Tallman lived in Nantucket for a great length of time, but I find not at all unusual that someone with connections to Dartmouth and Little Compton would have led a seafaring life that included a stay in Nantucket, that is the same course that many other followed.
Here's something else I found interesting. According to B.F. Wilbour's "Little Compton Families," Rebecca (Southworth)Tallman had a brother --- James Southworth --- who died in Rochester NY in 1832. I looked at the Monroe County rootsweb, and he is buried (complete with the notation that he is "born in Little Compton, RI") in the same section of the same cemetery (Mt. Hope) as a Stephen Talman (1767-1829). We should keep this in mind because I think we will be running into Stephen again very shortly. ("Your" Talmans are buried in Section G of the same cemetery).