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Telephone drawings, probably by Gilbert Edward Summers, c. 1898

Telephone Four Frequency Signalling System

Philipp Reis material

Bell's Articulating Telephone

Bell Telephone Laboratories Incorporated Album

Assorted papers relating to the Telephone

Letters and reprints relating to Philipp Reis and the early telephone

Coloured drawing showing cross sections of proposed twin and concentric submarine telephone cables

'Transatlantic Telephone cable'

A.l.s. to W H Preece from F J Jarvis-Smith

Typescript copies of articles on telephones and microphones

From the man who knows: advertisement for the Automatic Electric Company

File cover for papers on the South African telephone service

Subscription form for the Post Office Telephone System, Transvaal

Manuscript notes on telephone equipment