59. Enigmas
are compositions of a different character, based upon
ideas
, rather than upon words, and frequently constructed so as to mislead, and to surprise when the solution is made known. Enigmas may be founded upon simple catches, like Conundrums, in which form they are usually called
Riddles
, such as:
"Though you set me on foot,
I shall be on my head."
The answer is,
A nail in a shoe