1890 Thames Estuary Survey by Tizard – extractby in Buoyage, Channel, Notes, Piloton Posted on Chart from Tizard, T. H. (Thomas Henry). The Thames Estuary. 1890 Full 1890 paper in Nature. Image Credits and Sources 1890-Thames-Estuary-by-Tizard: Tizard, T. H. (Thomas Henry). The Thames Estuary. 1890