me no
longer will work. The German naval department, learning of the
airship patrol, has given its submarine commanders orders to travel at
great depth during daylight hours in the Channel and the southwestern
section of the North Sea, or to go to sleep on the bottom where the
sea is too shallow. In the evening the boat makes its escape from the
dangerous neighborhood.

The third field of action of airships--devastating hostile
countries--is the least valuable, although perhaps the most
spectacular of the activities of airships of the Zeppelin type. The
damage caused by the numerous Zeppelin raids over England, for
instance, is a subject of so much dispute that a true appreciation of
their value cannot be formed at present. While the German official
bulletins repeatedly declare that great material damage was done by
the bombs to military establishments, factories, harbor works, etc.,
the British statements dwell more upon the number of noncombatants who
were killed, and deny the infliction of any material damage.

Information of this kind is considered legitimate secrecy and it is
only when files of the British local and trade papers are examined
that an inkling of the real damage is obtained. Fires, boiler
explosions, railway traffic suspensions, and similar highly suggestive
items fill the columns of the papers, after every one of the Zeppelin
raids. On only one occasion, February 2, 1916, has the British War
Office admitted serious military damage in its official communication.
This communication was issued after exaggerated reports of the damage
caused had appeared in the German and neutral press, covering the
Zeppelin raids of January 30-31, 1916, and February 1, 1916, and
admitted officially the following: Bombs dropped totaled 393;
buildings destroyed: three railway sheds, three breweries, one tube
factory, one lamp factory, one blacksmith shop; damaged by explosions:
one munition factory, two iron works, a crane factory, a harness
factory, railway grain shed, colliery and a pumping station. "One of
the spectacular incidents of this raid was the chase of an express
train by the Zeppelin, the train rushing at its utmost speed of
seventy miles an hour into a tunnel, disappearing just as the first
bombs began to drop. The train remained in the tunnel for more than
an hour, waiting for the Zeppelin to fly away!" The official figures
of killed and wounded in this raid are given as sixty-seven killed,
and 117 injure