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Simpson, Strickland and Co of Dartmouth made steam engines for marine use.
The firm specialized in the building of fast steam launches. The works were, as far as possible, self-contained, and having their own foundry, machine shop, and boiler shop, including hydraulic flanging presses.
Redesigned the boilers and machinery of wooden launches; also adapted water-tube boilers for these purposes. Developed light, wooden boats - a speed of 20 knots was maintained by the Duck, a 30-foot launch with condensing engines built - a remarkable performance in those days.
1890 Note about working hours. 
1894 Built the Hibernia - the fastest river launch afloat. (Simpson and Strickland of Dartmouth). 
1894 The firm was formed into a limited liability company
1895 experimented with steam-propelled road vehicles.
1899 Engine for SS Artemis of Cambridge
1900 Tandem single-crank engines. 
1903 Creosote burner designed by Charles Ross.
1911 Details of their steam launch.