Illustration of Henry Knox by Alonzo Chapel Henry Knox, a first-hand witness to American history and a hero in the American Revolution, is possibly the greatest Irish-American to ever come out of Boston, a city with a plethora of Irish legends over the centuries. Born on July 25, 1750 along Boston's waterfront near the southwest corner of Atlantic Avenue and Essex Street, Knox was the seventh of ten children. His parents, William Knox and Mary (née Campbell), were Ulster Scots immigrants who came to Boston from Derry in 1729, part of a large exodus of Ulster-Irish Presbyterians who were emigrating to New England beginning around 1717-1718. As a boy, Knox attended the Boston Latin School , then at age 12, he went to work as an apprentice and clerk at Wharton & Bowes Booksellers at the corner of State and Cornhill (now Washington Street). The bookstore was right next to where the Boston Massacre occurred on March 5, 1770, and Knox came upon the imp...