The following data is extracted from Sketches of Addison County, Vermont.
Halnon, John, Cornwall, was born on June 22, 1836. His parents were James and Catherine (Dalton) Halnon. He came with his parents to America in 1849, and settled at Schuyler Falls, N. Y., and finished his education at Plattsburgh Academy. In 1853, when seventeen years of age, he came to Cornwall, Vt., and worked for Alonzo Bingham and Rollin J. Jones for five years, when he purchased a farm in Beekmantown, Clinton county, N. Y., where he lived for seven years. He returned to Cornwall in 1865 and purchased the place where he now resides, and which was the former Baxter place. It then contained (at the time of purchasing it) 350 acres. He now owns 550 acres. He occupies a part of the old Baxter house, which he has added to and remodeled until now it is a very fine residence. He is a successful farmer and stock raiser. He enlisted on the first call for troops in the spring of 1861, and took part in the first battle of Bull Run, in Company D, Sixty-Ninth New York Volunteers. He served out his term of enlistment, and was discharged at Albany, N. Y. He was married on April 21, 1870, to Isabella M. Tully, a daughter of Peter Tully, of Cornwall, Vt.
Source: Sketches of Addison County, Vermont