ALS signed “A. Conan Doyle,” one page, 5 x 8, The Psychic Book Shop, Library & Museum letterhead, August 9, [no year but circa 1927]. Letter to Mr. Reade, in full: "We are doing all we can in this most disgraceful case but it is hard work. I don't see how we can get all these famous men to look into the case. But we will not let go and we will win the end. But Slater is done for. I fear he is nearly insane. Your generous offer would be spent in extra advertising of the book. Suppose you sent on your own a personal ad in the Morning Post like this: 'The Scandal of the Century. Have you read 'The Truth about Oscar Slater'? How long is it to go on? Something of that sort, repeated several times would be good service." In very good to fine condition, with intersecting folds, some creasing, and minor paper loss to the lower left corner. Doyle was one of the several notable writers, journalists, and lawyers who advocated for the 1928 release of Oscar Slater, a man who spent 20 years in Peterhead Prison for the murder of Marion Gilchrist. In 1912, Doyle published The Case of Oscar Slater, a plea for a full pardon for Slater, and, some 15 years later, William Park published the referenced The Truth about Oscar Slater.Format: ALS