1 I believe the theme of this incomprehensible conundrum was the moon.
David Copperfield By Charles DickensGet Context In CHAPTER 33. BLISSFUL
2 This little conundrum came by the first post, and he was to follow by the next train.
The Return of Sherlock Holmes By Arthur Conan DoyleGet Context In III. THE ADVENTURE OF THE DANCING MEN
3 A sandwich and a cup of coffee, and then off to violin-land, where all is sweetness and delicacy and harmony, and there are no red-headed clients to vex us with their conundrums.
The Adventures of Sherlock Holmes By Arthur Conan DoyleGet Context In II. THE RED-HEADED LEAGUE