the wreck. Still deeper and deeper it settled.

Presently the boys at the port holes could discover the bends of the
sides, indicating that they were nearly to the ocean floor. In another
moment a slight bump told them that the craft rested on bottom.

"I saw a flash of light just now!" stated Jimmie.

"Where did it come from?" asked Ned, stepping forward.

"Just ahead of us on this side of the ship. The shadow lies heavily
there, so I can't make out what's located in that place!"

The boys had not long to wait, however, to discover the cause of the
flash which Jimmie had seen. Almost following the boy's words came a
dazzling beam of light, piercing the dark shadow like an arrow. For a
moment the boys were blinded as the searchlight's flame played on the
forward part of their vessel.

Presently the light shifted. It was turned against the side of the sunken
Wanderer. Up and down the light traveled, revealing the rugged sides of
the hull, with its covering of barnacles below what had been the water
line. Outward the beam went, showing nothing but ocean floor. Fishes were
illuminated and dazzled by the strong ray.

Finally the light returned to the false "U-13", where it settled for a
moment. Directly the light was turned off.

Jimmie had been shading his eyes with a protecting hand. He was,
therefore, not so much blinded by the glare as the others had been.

"There they go!" he cried, as the light was removed from the port hole
through which it had been shining. "They're rising!"

"Who can it be, I wonder?" questioned Ned.

"I'll never tell you!" declared Jimmie. "Oh, yes, I will, too!" he
amended his statement. "If you want to know, it's the 'U-13'!"

"The 'U-13'?" questioned the lads in chorus.

"The 'U-13'!" positively stated Jimmie. "Here," he cried, turning a
switch leading to the searchlight. "Take a look!"

The powerful storage batteries on the vessel occupied by the boys
generated a ray of light that pierced the darkness of the undersea world
with ease. Sharply outlined in the circle of flame the lads clearly saw
the form of a submarine vessel similar in many respects to their own.
There was the same sharp prow, the same tapering stern with conning
tower, keel, port lights, and every essential feature of the vessel upon
which they were located.

Outlined upon the side, in letters fully the same size as those upon
their own vessel, the lads saw distinctly the mark "U-13."

"What do you know abou