A section of the 1877 map revised 1915 which indicates the Custom House as three entities and implies that one is the Post Office. The Mercantile Marine Office building is divided into four entities, the double probably being the Marine Hotel, and the Marine Hotel (P.H.) public house is indicated annexed to the extreme seaward end of the building. The branch Post Office at Penarth Dock was closed during 1916 according to documents held at the National archives. [010] [398] [539]