John Haslet, a native of Ulster, Ireland, was born circa 1728 and emigrated to America about 1757. After playing an active role in the Pennsylvania militia during the French and Indian War, he eventually settled in the Milford area along this road on a tract of more than 400 acres. Although he had served as an ordained Presbyterian minister during his early years in Ireland, he became known for his medical skills after arriving in America. In January 1776, he was commissioned as a colonel and given command of the recently formed Delaware Regiment. After joining General Washington’s army in the summer of 1776, the regiment fought bravely in the Battles of Long Island and White Plains. Haslet and the regiment remained with Washington’s army for the crossing of the Delaware River on Christmas night and the attack at Trenton on December 26, 1776. Eight days later, he was killed in action during the Battle of Princeton. He was buried at the First Presbyterian Church in Philadelphia, and his remains were later transferred to Dover in July 1841. His residence is believed to have been located in this area, and his son, Governor Joseph Haslet, owned the property until it was sold in 1812.