r what sort of a current is bringing the bloomin' thing back
again!" announced Jack as Ned concluded his explanation. "It's moving its
lower edges most remarkably like a man walking!"

Ned's look of bewilderment increased. Clearly the boy was puzzled. Even
he, himself, was not quite satisfied with the explanation of the strange
sight which had greeted the boys.

Slowly forging ahead, the submarine passed toward the stern of the
Wanderer, shutting the strange figure out of sight.

"Turn around the stern again, Jimmie," requested Ned. "Go easy on the
engines, and we'll have a look from a new angle. This is getting rather
spooky, I must say. I want to examine into it!"

Again the false "U-13" rounded the stern of the wreck. Slowly the craft
nosed along the port side to a point abreast the mizzen chains. Directly
at a signal from the pilot, Harry shut off power altogether.

The strange magnetism that seems to exist in all objects at sea slowly
drew the submarine toward the ship. Its drift had been sufficient to
bring the vessel to a point abreast the main rigging before it stopped.

By this time the craft had approached close to the wreck. A very slight
jar told the boys that their vessel had touched the other. Eagerly all
watched from the portholes, now but a short space above the level of the
rail across which they looked. Directly all was still. At this depth, no
movement of water was discernible.

Feeling awed by the strangeness of the situation, the boys refrained from
speech. They watched for the reappearance of the strange figure.

Soon Jimmie hissed a warning. He reached out a hand to turn the switch
controlling the lights. The boat lay in utter darkness.

A figure stepped out of the Wanderer's companionway.

It appeared to be that of a person of medium build. The boys could now
see that it was clothed in what seemed to be a diver's suit. The helmet,
however, was not connected to any air pipe. Neither was there a line
leading upward to indicate the presence of assistance. A hump on the
shoulders, giving the impression of a knapsack, afforded much wonderment
and increased the mysterious look of the newcomer.

"Sh-h-h!" warned Ned in a sibilant hiss, as the figure came directly
toward their position. "Keep quiet!" he whispered.

A few steps carried the stranger to the rail. The boys saw him give a
start of amazement as he prepared to go over the side of the ship.
Clearly the strange diver was surprised to