Daniel Asher Alexander (1768-1846) was educated at St Paul's School. He was a silver medallist, Royal Academy. He was also surveyor to London Dock Company (1796-1831) and to Trinity House. Alexander designed lighthouses at Harwich and Lundy Island, and prisons at Dartmoor and Maidstone. William Vaughan (1752-1850) was a merchant and author. He was a director of the Royal Exchange Assurance Corporation, London, 1783-1829. He advocated canal extension, 1791; published pamphlets urging extension of London Docks, 1793-1797. His publications include: 'Answer to objections against the London-docks' (1796); 'A collection of tracts on wet docks for the Port of London: with hints on trade and commerce and on free-ports' (1797); 'A comparative statement of the advantages and disadvantages of the docks in Wapping and the docks in the Isle of Dogs' (1799); 'A letter to a friend on commerce and free ports and London-docks' (1796).
From the guide to the Committee of merchants appointed to take into consideration the states of the legal quays, 1794-1795, (British Library of Political and Economic Science)
