DREADNOUGHT (THE). An hospital-ship for seamen of all nations, moored off Greenwich June 20th, 1831. She fought at Trafalgar under Captain Conn, and captured the Spanish three-decker, the San Juan, which had previously been engaged by the Bellerophon and the Defiance. The population returns of 1841 show 185 males and 9 females on board this ship.
Peter Cunningham, Hand-Book of London, 1850
see also Henry Mayhew's Letters to the Morning Chronicle - click here