They slept heavily, none keeping watch.

Robertson alone was wakeful and suspicious; and even during his light slumbers his keen and long-trained senses were on the alert.
At midnight all was still.

The moon shone brightly down on the square block-houses and stockaded yard of the lonely little frontier fort; its rays lit up the clearing, and by contrast darkened the black shadow of the surrounding forest.

None of the sleepers within the log-walls dreamed of danger.

Yet their peril was imminent.