Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,446 pages of information and 233,880 images on early companies, their products and the people who designed and built them.
William Kennish (1799-1862) was born in Cornaa in the Isle of Man, and joined the Royal Navy in 1822.
Initially speaking only in his native Manx Gaelic, within 7 years he had risen through the ranks to become the master carpenter to the RN Mediterranean Fleet.
He invented a marine theodolite which led to his 'Method for concentrating the Broadside of a Ship Of War' to be so successfully trialled. He had numerous other inventions to his credit, including various pumps, a pneumatic sounding instrument, a propeller. He also advised on important construction projects in the USA.