When I wrote Fantastic L.A, I played a lot with the characters and all the objects used to solve the riddle. For example, crosswords. While thinking about them, I did some research and discovered the origin of the first crosswords. On the original document, definitions and a grid. In the center the word : fun (joy in French).
With the definitions of the original document that you will find at the end of my post, I wrote this short poem :
What we all should be ?
A daydream, a pigeon, a part of the ship
What artists learn to do ?
Opposed to less, exchanging the plurial of this
Link : article about Arthur Wynne.