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Mac, 241, The Ural Mountains: a new parlour game, 408 - 411, Mar 1862, Edward Ernest Bowen, Signed E.E.B, HS. Christopher Stray, VPR 36 (2003), 93 and Bart Schultz’s Henry Sidgwick: Eye of the Universe. An intellectual biography argue that H.S. = Henry Sidgwick as co-author --but Sidgwick’s quoted letter disavows any part in the article.