ストランド・マガジン
"A Case of Identity" was first published in the UK in "The Strand Magazine" in September 1891, and in the United States in the US edition of the "Strand" in October 1891. The story was published with seven illustrations by Sidney Paget in "The Strand Magazine". It was included in the short story collection "The Adventures of Sherlock Holmes", which was published in October 1892.