He was 7th child of John Henslow a master carpenter in the dockyard at Woolwich * 1745 Apprenticed to Sir Thomas Slade * 1762 Master Boat Builder at Woolwich * 1771 Assistant Surveyor to the Navy * 1784 Surveyor to the Navy * 1793 Knighted * 1806 retired to Sittingbourne, Kent Cape Henslow on Guadalcanal is named after him His son John Prentis Henslow, solicitor, was father of John Stevens Henslow. He was also the grandfather of Francis Hartwell Henslowe, who was the son of Edward Prentis Henslow.