A Connecticut Yankee in King Arthurs Court by Mark Twain Chapter 22 Page 4

I shall use no arts that come of the devil, and no elements not created by the hand of God. But is Merlin working strictly on pious lines?”

“Ah, he said he would, my son, he said he would, and took oath to make his promise good.”

“Well, in that case, let him proceed.”

“But surely you will not sit idle by, but help?”

“It will not answer to mix methods, Father; neither would it be professional courtesy. Two of a trade must not underbid each other. We might as well cut rates and be done with it; it would arrive at that in the end. Merlin has the contract; no other magician can touch it till he throws it up.”

“But I will take it