A Connecticut Yankee in King Arthurs Court by Mark Twain Chapter 43 Page 17

merely a lookout of a couple of boys to announce the enemy when he should appear again.

Next, I sent an engineer and forty men to a point just beyond our lines on the south, to turn a mountain brook that was there, and bring it within our lines and under our command, arranging it in such a way that I could make instant use of it in an emergency. The forty men were divided into two shifts of twenty each, and were to relieve each other every two hours.

In ten hours the work was accomplished.

It was nightfall now, and I withdrew my pickets. The one who had had the northern outlook reported a camp in sight, but visible with the glass only. He also reported that a few knights had been feeling their way toward us, and had driven some cattle across our lines,