Letter from [Alan Archibald Campbell] Swinton, to J. Kewley [Esquire] Responding to a previous letter informing it would be very difficult to make the telephone with the tungsten hot wire audible and that he did not attempt to do it himself. Informs he is sending, under separate cover, the slide of the drawing of the first telephone by Alexander Graham Bell, done for him in 1907. Encloses a copy of his paper from 1914 [enclosure not present]. 10 April 1929