1675 Thames Estuaryby in Sea Charton Posted on https://commons.wikimedia.org/wiki/File:A_draught_of_the_sands,_channels,_buoyes,_beacons_and_sea-marks_upon_the_coast_of_England-_from_the_Southforeland_to_Orfordness._Discovered_by_Capt._Gilbert_Crane,_and_Capt._Tho-_Browne,_Elder_Bretheren_of_ye_Trinity_House._RMG_F8058.tiff John Darby; Lamb, Francis; Seller, John, Public domain, via Wikimedia Commons
