"The Adventure of the Cardboard Box" is one of the 56 short Sherlock Holmes stories written by British author Sir Arthur Conan Doyle. It is the second of the twelve Memoirs of Sherlock Holmes in most British editions of the canon, and second of the eight stories from His Last Bow in most American versions. The story was first published in the Strand Magazine in 1892.
"The Adventure of the Cardboard Box" was not published in the first British edition of The Memoirs of Sherlock Holmes, but it was published in the first American edition, though it was quickly removed because of its controversial subject matter. The story was later published again in American editions of His Last Bow, and put into British editions of the Memoirs.
When the "Adventure of the Cardboard Box" was removed from publication, Conan Doyle moved a passage from it that showed Holmes "mind reading" Watson to "The Resident Patient". (The text of the moved passage runs from "Our blinds were half-drawn, and Holmes lay curled upon the sofa" to "I should not have intruded it upon your attention had you not shown some incredulity the other day.".) This passage reveals Dr. Watson to be an avid admirer of Henry Ward Beecher, whose portrait he keeps at his home. The passage seems to have little to do with the mystery and seems mainly intended to let Holmes reach a new peak of his deductive powers. However, it might be considered an oblique hint, dropped by Doyle for an observant reader, since Beecher was involved in a famous adultery trial, which would have easily come to the mind of reader at the time of publication.