Walton-on-the-Naze is a small resort town in Essex, south of the port of Harwich. The Naze is a headland or peninsula north of the town. The nearby Hanford Water is the setting for Secret Water. When Roger says It’s a very secret place Titty says Secret Water .... Lets call it that (SW3).” Christina Hardyment wrote that Arthur Ransome spent a night on Hamford Water on board the Nancy Blackett in 1936 (CFT p112)