A Connecticut Yankee in King Arthurs Court by Mark Twain Chapter 37 Page 12

I fell to ciphering. In half an hour it would be nine o’clock. Knights and horses in heavy armor couldn’t travel very fast. These would make the best time they could, and now that the ground was in good condition, and no snow or mud, they would probably make a seven-mile gait; they would have to change horses a couple of times; they would arrive about six, or a little after; it would still be plenty light enough; they would see the white cloth which I should tie around my right arm, and I would take command. We would surround that prison and have the king out in no time. It would be showy and picturesque enough, all things considered, though I would have preferred noonday, on account of the more theatrical aspect the thing would have.

Now, then, in order to increase the strings to my bow, I thought I would look