below for a few moments. After reaching the conning tower he paused,
for a few moments, to look keenly all about him.

Yet, look as he would through the night, the machinist's vision could
not see that the bush hidden pair on shore, guessing his intention
from his stop by the conning tower, had silently taken to the water.
With them they towed the metal cylinder, which floated. To the cylinder
was attached one end of the light wire.

Some distance out from the shore the pair halted, treading water, only
their eyes above the surface. But Williamson could not make out such
small objects at the distance. Then he went below.

"Now, for it," breathed one of the swimming pair, tensely.

Both swimmers struck out strongly, yet silently, making fast progress
through the water by means of some of the best strokes known to swimmers.

When they reached the port side of the submarine Williamson was still
below. Nor had the attention of the marine guard on the "Waverly"
been attracted.

In just another swift instant the swimmers made a dive that carried them
and their cylinder below the surface.

Straight up against the bottom of the hull the pair went.

When they returned to the surface the metal cylinder was in place below.

Glancing backward only once, to make sure that Williamson was not yet