Two Travellers happened on their journey to be engaged in a warm dispute about the colour of the Chameleon. One of them affirmed that it was blue and that he had seen it with his own eyes upon the naked branch of a tree, feeding in the air on a very clear day.  
The other strongly asserted it was green, and that he had viewed it very closely and minutely upon the broad leaf of a fig-tree.
 
Both of them were positive, and the dispute was rising to a quarrel; but a third person luckily coming by, they agreed to refer the question to his decision.
 
"Gentlemen," said the Arbitrator, with a smile of great self-satisfaction, "you could not have been more lucky in your reference, as I happen to have caught one of them last night; but, indeed, you are both mistaken, for the creature is totally black."
 
"Black, ............