Admiralty Chart No 1285 Bahia Begueta to Rio Chicama, Published 1840, Corrections to 1958 - PICRYL - Public Domain Media Search Engine Public Domain Search
Admiralty chart - Wikipedia
File:Admiralty Chart No 2766 North-east Coast of New Guinea, Published 1866, Large Corrections 1938.jpg - Wikimedia Commons
Paper Publication corrections from Riviera Charts
File:Admiralty Chart No 597 Delagoa Bay to Cape Gardafui, Published 1882, Corrections to 1952.jpg - Wikimedia Commons
File:Admiralty Chart No 214 Solomon Islands, Published 1874, Corrections to 1939.jpg - Wikipedia