Willans and Ward
Consulting engineers, of 51 Lincoln's-inn Fields
Tangyes of Birmingham had the licence to make engines to Peter William Willans's patented design but there were numerous failures, so Willans left his employers, Messrs. Penn, to join Alexander Ward, who had bought a share of the patents, and, as Willans and Ward, Consulting Engineers, to devote the whole of his time to try to make a success of the undertaking.
1875 Advert: 'THE WILLANS PATENT ENGINE. for steam launches, yachts, and other vessels. Simple, compact, noiseless. - WILLANS and WARD, Engineers, 51 Lincoln's Inn-fields, London, W.C.' 
1876 Advert: 'WILLANS PATENT ENGINE, FOR STEAM LAUNCHES AND YACHTS.
Noiseless and compact; no exposed machinery; working parts few, extremely simple, and perfectly accessible ; most unlikely to get out of order ; occupies less space, and is considerably lighter than ordinary engines of equal power. Price list on application. WILLANS and WARD, Engineers,
51, LINCOLN’S INN FIELDS, LONDON, W.C.
Steam Launches and Yachts supplied complete, with all machinery and equipments. 
Messrs. Tangyes withdrew from the business; Messrs Hunter and English of Bow started to make the Willans engine for marine purposes
1876 Mr. Willans was appointed manager of this branch of their business.
Sources of Information
- The Engineer 1875/10/01
- Field - Saturday 24 July 1875
- Naval & Military Gazette and Weekly Chronicle of the United Service - Wednesday 19 July 1876