A Connecticut Yankee in King Arthurs Court by Mark Twain Chapter 24 Page 19

“It will be difficult — perhaps impossible.”

“My art knoweth not that word. The more difficult it is, the more certainly will I reveal it to you.”

You see, I was working up the interest. It was getting pretty high, too; you could see that by the craning necks all around, and the half-suspended breathing. So now I climaxed it:

“If you make no mistake — if you tell me truly what I want to know — I will give you two hundred silver pennies.”

“The fortune is mine! I will tell you what you would know.”

“Then tell me what I am doing with my right hand.”

“Ah-h!” There was a general gasp of surprise.