A Connecticut Yankee in King Arthurs Court by Mark Twain Chapter 27 Page 11

things that are but a little way off, the other is the gift to foretell things that are whole ages and centuries away.

Which is the mightier gift, do you think?”

“Oh, the last, most surely!”

“True. Does Merlin possess it?”

“Partly, yes. He foretold mysteries about my birth and future kingship that were twenty years away.”

“Has he ever gone beyond that?”

“He would not claim more, I think.”

“It is probably his limit. All prophets have their limit. The limit of some of the great prophets has been a hundred years.”