1801 William Heather Chartby in Sea Charton Posted on To the Right Honourable the Master, Wardens, & Elder Bretham of the Trinity House, this chart of the entrances to The River Thames 1801 William Heather Image Credits and Sources 1801-William-Heather-Thames-Estuary: https://www.europeana.eu/item/109/https___hispana_mcu_es_lod_oai_bvpb_mcu_es_440923_ent0 | Public Domain Mark 1.0
