Letter from Henry Thomas Tizard, to B Lockspeiser, Ministry of Aircraft Production, Thames House, Millbank, S.W.1 'Dear Lockspeiser, I enclose a letter from Professor H.L. Riley. I have written to say that I cannot help his friend. It is just possible that an experienced pilot of Ferry Command has something good to suggest, so you might like to write to Professor Riley to tell his friend to call some time and see some appropriate man on your staff. Yours sincerely, H.T.T.' 8 January 1945