But a close observer would have seen, as Alfred did, that there was a certain alertness in that rigid and motionless figure.

Wetzel's eyes were fixed on the western end of the island.

Almost involuntarily Alfred's eyes sought the same direction.

The western end of the island ran out into a long low point covered with briars, rushes and saw-grass.

As Alfred directed his gaze along the water line of this point he distinctly saw a dark form flit from one bush to another.