Correspondence with the following: R Baldcock; A J Clark (Royal Society); Mary Greene; V Z de Ferranti; W P Lucas (Thorm EMI); J Pingree (Imperial College); C Powell; F Rumsey; D Seward. Includes information on the following subjects: contacts for Blumlein biography; Dr Vladimir Zworykin; history of the Ferranti Company; audio engineering; formation of the Marconi-EMI Television Company; Blumlein's student record; radar.
