The following data is extracted from Sketches of Addison County, Vermont.
Mack, Thomas, Vergennes, was born in Waterbury, Washington county, Vt., in 1853, and settled in Vergennes, Vt., in 1872, as a mechanic, manufacturing sash, doors, and blinds, and later he became a grocer and provision dealer. He was unfortunately burned out three times in four years, and in 1882 he embarked in the coal business, taking the old yard founded by Captain Hall. He also is a manufacturer of pure apple cider. He was a water commissioner in 1879, and one of the prudential school committee in 1876, '77, '78, and 1879; was one of the aldermen for 1880, and a member of the common council in 1883, '84 and 1885. He was married in 1879 to Mary A. McMahon, of Vergennes, Vt. They have had two children born to them -- James Leonard and an infant, Florence. Thomas Mack was a son of John and Mary (Harvey) Mack, who were born in Ireland, and settled in Waterbury, N. Y., where they were married in 1851. They had a family of twelve children born to them, six of whom are now living, three sons and three daughters. John Mack left Ireland in 1848, at the time of the Smith O'Brien difficulty, which was a marked day in Ireland.
Source: Sketches of Addison County, Vermont