"The Adventure of the Cardboard Box" is one of the 56 short Sherlock Holmes stories written by Sir Arthur Conan Doyle. The story was first published in The Strand Magazine in the United Kingdom in January 1893, and in Harper's Weekly in the United States on 14 January 1893. It is the second of twelve stories collected in The Memoirs of Sherlock Holmes in most British editions of the canon, and the second of the eight stories from His Last Bow in most American versions.