[Captain Basil Rupert Willett [MARCONI; RADAR]] Typed Letter Signed to the Secretary, Royal Society of Arts, together with unsigned carbon copy of the secretary's reply.

Willett (died 1966) and C. E. Horton were the two Royal Navy representatives to whom, in the autumn of 1940, it was demonstrated that the 10cm ground-based, experimental radar equipment could track ships. LETTER (one page, octavo, creased and grubby, with staple holes to one corner, stamped and docketed): Acknowledges a letter of 4 July, and is 'honoured to accept the invitation of the Council of the Royal Society of Arts to seek election as a Fellow of the Society'. Encloses a 'Form of Proposal' and a cheque (neither present) and suggests the setting up of a banker's order. CARBON (one page, quarto, good on creased paper, docketed in red pencil): Acknowledges Willett's letter and returns the application form. '[I]t will give me much pleasure to make the necessary arrangements for your election at the meeting of the Council on October 13th. [.] in the meantime you will be considered entitled to the privileges of Fellowship [.]'.