Once only did he detect a movement on the part of the suspicious party; and then Stackpole twisted about as though desirous of assuming a new position, and at the same time he raised his head and took a sweeping glance around, just as any woodsman might during the night, a habit born of eternal watchfulness; yet under the circumstances it was more or less suspicious to see how the fellow completed his hasty survey by a quick look in the direction of the boats, as if quite conscious of the fact that Owen was still there on guard.