Letter from [Alan Archibald Campbell] Swinton, to The Editors, The Electrical Review With regard to his review of the book on Sir Joseph Wilson Swam, unsure whether "M. E. S" and "E. R. S" are both men, as he has been told by Mr. H. C. Marillier, whose wife is a cousin of the Swans that one of them is probably a woman, hoping this can be ascertained from the publishers. 3 May 1929