David Rowan and Co
David Rowan and Co, made engines for shipbuilders who had no engine works.
1877 Company founded by David Rowan.
1889 See 1889 Shipbuilding Statistics for detail of the marine engines produced.
1917 Private company - taken over by Lithgows.
1925 See Aberconway for information on shipbuilding h.p produced in 1904 and 1925.
1961 Marine engineers. 
Sources of Information
- 1961 Dun and Bradstreet KBE
- The Times, Dec 05, 1961