Contains: ‘Lecture given before Danish Engineering Society on 23rd January 1934’ 29th January 1934, contains photographs; Equipment listing – ‘High Power Transmitters’ Production Issue 3, 1.6.45; Airborne Communication Equipment listing 20.9.43, 9.3.45; Development Report No.3 for Quarter Ending March 1942 – 23.3.42; Allocation of Engineering Report 23rd February 1962; ‘Dates from “A Record of Achievement”’ 24th March. 1964.