from "Nathaniel Washburn, an American Pioneer" by Cathy Lutes Gowdy. Per Cathy, Nathaniel enlisted (in the army of the Revolution) in 1775 in Pennsylvania.
Nathaniel and [wife] Christina first appear in public records in 1771 at the Machackemeck Church, Orange County, New York. He received land warrants on Feb 23 1775 in Northampton Co.,PA. Nathaniel appears in 1790 federal census in Washington co.,PA.
In 1796 Nathaniel Washburn settled in what became Monroe Township, Adams, Ohio although he arrived in Ohio before this date. About 1799 he built a mill on the middle fork of Donalson Creek. At the first court session, held on September 12, 1797, one of the three supervisors of roads was Nathaniel. At the March session 1798 in Adamsville, he was appointed one of the overseers of the poor.
On the occasion of the formation of the first grand jury, Nathaniel was selected to serve. He served again as a juror for the March 1799 session held in the town of Washington. In 1810 he lived in Tiffin township, Adams, Ohio.
The records of the war of 1812 show that Nathaniel served as a private in captain Thomas Lewis' company, Colonel Allen Trimble's regiment, Ohio mounted volunteers. He served for a month and was over 70 years old. He appears in Tiffin township on the 1812 tax duplicate. Tax records list him in Tiffin township in 1817 and in Monroe township in 1818, in 1819, "penalties, Nathl. Washburn." He does not appear on the 1820 census. It is generally believed in the area that Nathaniel is buried in Briar Ridge Cemetery, Adams County.
Other sources give his birth and death dates as 1728 and 1814, respectively.