The following data is extracted from Sketches of Addison County, Vermont.
Sullivan, Daniel, Middlebury, was born in the County of Cork, Ireland, on April 25, 1813. He came to America and settled in the town of Middlebury, Addison county, Vt., in the spring of 1837, and the same season engaged in farming. He afterwards settled in Cornwall, Vt., and entered the employ of G. W. Wooster, with whom he remained for ten years. He was married in 1839 to Mary Twomey, who was born in county Cork, Ireland, on March 25, 1814. They had eleven children born to them, eight sons and three daughters, nine of whom are now living. He came to Middlebury, Vt., in 1857, and purchased the place where he has since lived, and which consists of about 100 acres, and in 1879 he purchased the family residence. He is a prosperous and successful citizen.
Source: Sketches of Addison County, Vermont