I'll lay my life the thing is blue."
"And I'll be sworn, that when you've seen
The reptile, you'll pronounce him green."
"Well, then, at once to ease the doubt,"
Replies the man, "I'll turn him out:
And when before your eyes I've set him,
If you don't find him black, I'll eat him."
He said: then full before their sight
Produced the beast, and lo!—'t was white.
Both stared, the man looked wondrous wise—