Sir John Henslow (9 October 1730 – 22 September 1815) was Surveyor to the Navy (Royal Navy) a post he held jointly or solely from 1784 to 1806. Career 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. From 1793 he worked jointly with William Rule. Among the vessels he designed were the s and four frigates to the same design, the first of which was . He also designed the Bloodhound-class gun-brigs and Conquest-class gun-brigs. The sixth rates were a series of six ships built to his 1805 design. Perhaps his smallest vessels were the two Placentia-class sloops of 42 tons burthen, which he designed for coastal patrol duties off Newfoundland. Family 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. Notes and references 1730 births People from Woolwich 1815 deaths Surveyors of the Navy 18th-century British engineers 19th-century British engineers 18th-century Royal Navy personnel 19th-century Royal Navy personnel