A German submarine of the largest seagoing type on April 10 appeared in the port of Monrovia, the capital of Liberia, on the west coast of Africa, and bombarded the wireless and cable stations there. The submarine threw scores of shells from her deck guns into the wireless station, causing extensive damage. She had just turned her attention to the cable offices when a steamer was sighted passing the harbor mouth. The submarine left in chase and did not return. Liberia declared war on Germany Aug. 4, 1917. Some indication of the losses sustained by the German U-boat fleet is contained in the following reports: Nine members of the crew of a German submarine which was sunk by an American liner on March 10, when two days out from a French port, were taken prisoners. The rest of the crew perished, the Captain committing suicide when he saw that his submarine was doomed. Under a heavy attack from three German submarines and three German destroyers, a British seaplane persisted in its efforts against another enemy U-boat and succeeded in sinking it before being damaged by the fire of the other enemy warships. Seaplanes also accounted for three other submarines. A German U-boat while laying mines on the British coast struck one of them and was blown in two. The only survivor was the Captain, who was taken prisoner. The remainder of the crew, numbering seventeen, were drowned in the submarine. The German submarine, it is stated in the report of the British War Cabinet, has a surface speed up to 18 knots and a submerged speed of 10 to 11 knots. She carries from fifteen to twenty torpedoes; she can travel 100 miles completely submerged; and she can remain under water on the bottom for a period up to forty-eight hours. A submarine attacking with a torpedo only shows about three inches of periscope at intervals, with the result that few ships which are torpedoed ever see the submarine which has carried out the attack. The range of the torpedoes fired by a submarine is anything up to five miles, and the speed of the torpedo is as high as 40 knots. Typical U-Boat Methods From British Admiralty Records _The British Admiralty on March 17, 1918, permitted publication of the logs of a number of vessels that had been sunk by German submarines. These records reveal many stories of heroism and sacrifice. Some of the incidents recorded are as follows:_