Blueprint: Electrode Selector Wiring

Letter from C. Horne to F.L. Golla, 20 June 1941

Blueprint: E.E.G. circuit, power unit and two channel amplifier

Brief specification of apparatus MME 7

Letter from C. Horne to F.L. Golla, 12 June 1941

Photograph: Marconi high speed recorder

Letter from C. Horne to William Grey Walter, 10 September 1942

Photograph: Marconi ticker tape recorder

Marconi Instruments papers

Letter from C. Horne to F.L. Golla, 30 June 1941

Photograph: Marconi double pen recorder

Photograph: Marconi ink recorder