"It need be only an hour long.

I'll drink some more coffee, and then walk a while, so as to be sure to keep awake." "I'll take the second trick," nodded Dick.
The schedule for watch tricks was quickly made up.

Then all but Dave hastily sought their cots.

Darkness was not an hour old when Dave was the only member of the camp awake.

Had the high school boys been less healthy and sturdy their hearty suppers might have summoned the nightmare, but they slept on soundly.
Dick, however, stretched, gaped, then sprang up when Darry called him.