The following text is from the original listed building designation:
HARBOUR STREET 1. 5273 (South-East Side) Nos 50 and 51 TR 1066 NE 1/l7 23.12.75. II GV 2. Late C18 or early C19 buildings. 3 storeys. 1 window each lst floor. Fronted with weatherboarding. Tiled roofs, No 50 with a half hip, No 51 hipped with dormer. Glazing bars intact. Wooden shutters to ground flint windows. No 50 has a doorway in moulded architrave surround with flat hood over. Passage through the ground floor between the houses.
Listing NGR: TR1070166801

English Heritage, List of Buildings of Special Architectural or Historic Interest (Map). SKE16160.