Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 138,908 pages of information and 225,312 images on early companies, their products and the people who designed and built them.
1832 Green, Wigram and Green of Blackwall employed from 500 to 1,000 men 
1833 Green, Wigram and Green of Blackwall launch the 'Monarch' the largest steam-ship ever built in the country and owned by the Edinburgh Steam Co. Powered by two 100 hp engines by Boulton and Watt 
1843 the shipbuilding partnership of Wigram and Green expired - the shipyard was divided down the middle. Money Wigram and Sons retained the western half and the Greens the eastern half, later becoming R. and H. Green and Co.