before me, there came from the direction of the great lake an
increasing sound that rose to the volume of a shriek. We all
looked up as the noise approached apparently just above us, and
a moment later there followed a terrific explosion which hurled
us to the ground. When we clambered to our feet, we saw a large
section of the west wall torn and shattered. It was Olson who
first recovered from his daze sufficiently to guess the
explanation of the phenomenon.

"A shell!" he cried. "And there ain't no shells in Caspak
besides what's on the U-33. The dirty boches are shellin'
the fort. Come on!" And he grasped his rifle and started on
a run toward the lake. It was over two miles, but we did not pause
until the harbor was in view, and still we could not see the lake
because of the sandstone cliffs which intervened. We ran as fast
as we could around the lower end of the harbor, scrambled up the
cliffs and at last stood upon their summit in full view of the lake.
Far away down the coast, toward the river through which we had come
to reach the lake, we saw upon the surface the outline of the U-33,
black smoke vomiting from her funnel.

Von Schoenvorts had succeeded in refining the oil! The cur had
broken his every pledge and was leaving us there to our fates.
He had even shelled the fort as a parting compliment; nor could
anything have been more truly Prussian than this leave-taking of
the Baron Friedrich von Schoenvorts.

Olson, Whitely, Wilson, and I stood for a moment looking at
one another. It seemed incredible that man could be so
perfidious--that we had really seen with our own eyes the thing