You're always on the virst relief.

You'll fall in down there at the gorner of the vagon bark." "Wal--yes--s'pose I will," sighed the skipper, as he rolled up his blankets and prepared for two hours' sentry duty.
Let us look into the arrangements for the protection of the caravan.

With Coronado's consent Thurstane had divided the eighteen Indians and Mexicans, four soldiers, Texas Smith, and Glover, twenty-four men in all, into three equal squads, each composed of a sergeant, corporal, and six privates.

Meyer was sergeant of one squad, the Irish veteran Kelly had another, and Texas Smith the third.

Every night a detachment went on duty in three reliefs, each relief consisting of two men, who stood sentry for two hours, at the end of which time they were relieved by two others.
The six wagons were always parked in an oblong square, one at each end and two on each side; but in order to make the central space large enough for camping purposes, they were placed several feet apart; the gaps being closed with lariats, tied from wheel to wheel, to pen in the animals and keep out charges of Apache cavalry.