 Napier continued building steamship engines, eventually expanding into steam engines for ocean-going vessels.In 1835 he procured a controversial contract with the East India Company to build an engine for their ship, the paddle steamer "Berenice" which, built by David Napier, (Napier's cousin) and using Napier's engine, proved faster than her sister ship, the paddle steamer "Atalanta" (built on the Thames) – beating her to India by 18 days on their maiden voyage.In 1838, Napier was contracted by the Admiralty to produce 280 NHP engines for two of their ships, the first class paddle steamer sloops "Stromboli" and "Vesuvius"; but after that, orders ceased.