In Rev. Sylvester Nash's book, the following appears about Rivera NASH:
"Dr. Rivera Nash, son of Joseph and Anne Skinner Nash, of Wintonbury, CT, born 8 April, baptized 12 April, 1767, was taken at 2 years of age and brought up by a brother of Mr. Booth, who gave him a good English education; he afterwards, by his own effort, obtained a knowledge of Latin, and studied medicine, at first, with Dr. Ware, of Conway, Mass. and then with Dr. Bates (probably of Coleraine) Mass.
He married 12 October 1796, Naomi Amsden, of Ashfield, Mass., and settled, as a physician, first, in Heath, Mass., where his 2 eldest children were born (Duplisis & Rebecca). He then removed to Ashfield, and lived there several years, where the 3rd and 4th were born (Mary & William) and then he removed to Smithfield, near Cazenovia, N.Y. and resided some years in the village of Peterboro, where his 2 youngest children were born (Asahel & Maria).
Dr. Rivera Nash died in Woodstock, a village of Cazenovia, 16 February 1816 at age 49. After Dr. Nash's death his widow Naomi married Jared Moss. Mrs. Naomi Moss died in Vernon, Oneida, N.Y. 25 August 1850."
From the Gazetteer of Towns at: http://www.rootsweb.com/~nymadiso/gzsmthfd.htm Rivera Nash is noted as the 3rd doctor to settle in Smithfield, NY: Elijah Pratt was the first physician, in 1801 or 1802, as he was also the first male school teacher; Tabitha Havens being the first school teacher in town, having a school of five or six scholars, at Peterboro, in 1801. Rev. Joshua Johnson (Presbyterian) was the first resident preacher, in 1806. Nehemiah Huntington was the first lawyer, in 1807. Captain Daniel Petrie was the first postmaster, in 1807; John Downer and Peter Weber, the first blacksmiths, in 1802; Rueben Long built the first grist mill and first saw mill, in 1802; John Dourance was the second physician, in 1806, and Rivera Nash the third, in 1807.