Letter from [Valentine] Lawford (Foreign Office) to [Edith] Watson [Prime Minister's Private Secretary] suggesting that she draw the matter to the attention of [1st] Lord Beaverbrook [earlier Sir Max Aitken, Minister of Aircraft Production], otherwise send a "soothing reply" to Sir Walter Windham emphasising the difficulty of raising awareness in America "without infringing U.S. regulations and bringing discredit and suspicion on their cause and their Government".