"Post Office Telephones" . . . "post-mistress" . "Special Investigations Unit of the General Post Office" . . "GPO" . . . "Royale General Post Office" . . . . "General Post Office building" . . . "Postal service" . . . . "Post Office telegraph" . "General Post Office" . . . . . . . "sub post office" . "the GPO" . "General Post Office" . . . . "G.P.O." . . "Post Office Corporation" . "(British) Post Office" . . . . "imperial Post Office" . . . "1969-10-01" . . . . . . . . . "English postal system" . "General Post Office Public Relations Department" . . . "The Post Office" . . . . . . . . . "G. P. O." . . "HM General Post Office" . "Royal Mail" . . "British GPO/BT" . . "1660" . "1969" . "post office" . . "post-office" . . . "Post Office" . . "General Post Office's" . . "British Post Office" . . . "Central Telegraph Office" . "postal service" . "English postal service" . "General Post Office (GPO)" . . . . . . "PO" . "British post office" . "General Letter Office" . "Secretary to the General Post Office" . . .