After that meal was over Dave asked: "We're going to keep regular guard to-night, aren't we ?" "Yes," Dick answered.

"We'll turn in at nine o'clock and keep guard until six in the morning.

That will be nine hours---an hour and a half of guard duty for each fellow.

Suppose we draw lots to decide the order in which we shall take our tricks of guard duty." This was done.

To Prescott fell the second tour, from ten-thirty until midnight.