The Justitia was docked by the Woolwich Arsenal in the blue region of the River Thames.  The Isle of Dogs, which appears in the far east of Reynolds' 1859 map, is seen to the left.

Source: Ordnance Survey of Brentwood and East London, engraved at the Ordnance Map Office, Southhampton. Published by Colonel Colby, July 12, 1844, levels revised in 1884, railways inserted to November 1892.