A Connecticut Yankee in King Arthurs Court by Mark Twain Chapter 6 Page 12

There were a thousand pathetic protests, but I couldn’t shorten up any, for I couldn’t remember how long a total eclipse lasts. I was in a puzzled condition, anyway, and wanted to think. Something was wrong about that eclipse, and the fact was very unsettling. If this wasn’t the one I was after, how was I to tell whether this was the sixth century, or nothing but a dream? Dear me, if I could only prove it was the latter! Here was a glad new hope. If the boy was right about the date, and this was surely the 20th, it wasn’t the sixth century. I reached for the monk’s sleeve, in considerable excitement, and asked him what day of the month it was.

Hang him, he said it was the twenty-first ! It made me turn cold to hear him. I begged him not to make any mistake about it; but he was sure; he knew it