In the Adriatic Austria lost a submarine, the _U-11_, through a unique action. The submersible was sighted on July 1, 1915, by a French aeroplane. The aviator dropped two bombs which found their mark on the deck of the submarine and sank her. Austria had, during that month, made an attempt to capture the Austrian island of Pelagosa, which had been occupied by the Italians on July 26, 1915. But July 29, 1915, the fleet of Austrian cruisers and destroyers, which made the attack, was driven off by unnamed units of the Italian navy. But a loss by the latter had been incurred on July 7, 1915, when the armored cruiser _Amalfi_, while scouting in the upper waters of the Adriatic Sea, was sighted and torpedoed by an Austrian submarine. She sank, but most of her men were saved. Another Austrian submarine had the same success on July 17, 1915, when it fired a torpedo at the Italian cruiser _Giuseppe Garibaldi_, and saw her go down fifteen minutes later. Italy endeavored to imitate the actions of Germany when, on July 6, 1915, she proclaimed that the entire Adriatic Sea was a war zone and that the Strait of Otranto was in a state of blockade. All the ports of Dalmatia were closed to every kind of commerce. Near the coasts of Turkey, toward the end of the first year of war, there was fought the second duel between submarines. This time the vanquished vessel was the French submarine _Mariotte_, which, on July 26, 1915, was sunk by a torpedo from a German submarine in the waters right near the entrance to the Dardanelles. Britain ended the first year of naval warfare by destroying the German cruiser _Koenigsberg_, which, since the fall of the year before, had been lying up the Rufiji River in German East Africa, after having been chased thence by a British cruiser. It was decided to destroy her in order that she might not get by the sunken hulls that the British had placed at the mouth of the river in order to "bottle her up." Consequently, on the morning of July 4, 1915, after her position had been noted by an aviator, two British river monitors, _Severn_ and _Mersey_, aided by a cruiser and minor vessels, began to fire upon the stationary vessel. Their fire was directed by the aviator who had discovered her, but it was at first almost ineffective because she lay so well concealed by the vegetation of the surrounding jungle. She answered their fire and succeeded in damaging the _Mersey_, but after being bombarded for six hours she was set on fire. When the British monitors had finished with her she was a total wreck. CHAPTER XXXI STORY OF THE "EMDEN" We now return to the exploits of the _Emden_, its mysterious disappearance and the narrative of its heroes--a great epic of the sea.