Building Warrant: additions to telephone exchange, Bon Accord Street (drainage plans, floor plans, elevations, sections, steelwork drawings and details) Applicant: Post Office Telephones Department Architect: (Register - J W Paterson, architect] HM Office of Works, 122 George Street, Edinburgh Date of decision: approved 14 October 1937 Remarks: register entry 18170 (16 sheets, print on tracing cloth) [Modern address: 27 - 35 Bon Accord Street] 14 October 1937