Lawrence Brothers
of City Ironworks, Pitfield St, London
1852 Frederick Lawrence (1828-1864) entered into partnership with his brother, Alfred Lawrence, and they jointly established the City Ironworks, London, where Frederick was able to turn to practical account his mathematical and engineering knowledge.
early 1850s: supplied sluices for the improvement of the River Lea Navigation
1858 Showed patented sluice for locks
1862 Special recognition at the 1862 London Exhibition