e.
When the submarine left the scene the Norwegian steamship again
returned to the _Dumcree_ and managed to take off all of her crew
and passengers. Three trawlers, one of them French, were sunk in
the same neighborhood during the next forty-eight hours.

As soon as Italy entered the war an attempt was made by the Teutonic
Powers to establish the same sort of submarine blockade in the
Adriatic which obtained in the waters around Great Britain. This
was evinced when the captain of the Italian steamship _Marsala_
reported on May 21, 1915, that his ship had been stopped by an
Austrian submarine, but the latter not wishing to disclose its
location to the Italian navy, allowed his ship to proceed unharmed.

The suspicion that the German admiralty maintained bases for their
submarines right on the coasts of Great Britain where the submersible
craft could obtain oil for driving their engines, as well as supplies
of compressed air and of food for the crew, was confirmed on the
14th of May, 1915, when it was reported that agents of the British
admiralty had discovered caches of the kind at various points in
the Orkney Islands, in the Bay of Biscay, and on the north and
west coasts of Ireland.

In order to damage shipping in the "war zone" by having ships go
wrong through having no guiding lights an attack was made by a
German submarine on the lighthouse at Fastnet, on the southern
coast of Ireland, on the night of May 25, 1915. Shortly after nine
in the evening the submarine was sighted in the waters near the
lighthouse by persons on shore. She was about ten miles from Fastnet,
near Barley Cove. When she came near enough to the lighthouse to
use her deck guns, men on shore opened fire on her with rifles,
and she submerged, not to reappear in that neighborhood again.

But this same submarine managed to do other damage. The American
steamship _Nebraskan_ was in the neighborhood on its way to New
York. The sea was calm and the ship was traveling at 12 knots, when
some time near nine o'clock in the evening a shock was felt aboard.
A second later there came a terrific explosion, and a subsequent
investigation showed that a large hole, 20 feet square, had been
torn in her starboard bow, not far from the water line. When she
began to settle the captain ordered all hands into the small boats.
They stayed near the damaged ship for an hour and saw that she was
not going to sink. When they got aboard again they found that a
bulkhead