Daredevil deeds have been done by the submarines of both sides in the Dardanelles. The little _B-11_ swam up the straits, threading her way through mine-field after mine-field, her captain keeping his course by “dead-reckoning” with map and compass and stop watch. To have exposed his periscope would have drawn the fire of the many shore batteries, to have dived a few feet too far in those shallow waters would have meant running aground, to have misjudged the swirling, changing currents might have meant annihilation. But Commander Holbrook brought his vessel safely through, torpedoed and sank the guard-ship _Messudieh_, a Turkish ironclad of the vintage of 1874, and returned to receive the Victoria Cross from his king and a gigantic “Iron Cross” from his brother officers. The _E-11_ went up even to Constantinople, torpedoed a Turkish transport within sight of the city and threw the whole waterfront into a panic. More transports and store-ships were sunk or driven on shore in the Sea of Marmora, a gunboat was torpedoed, and then the _Kheyr-el-din_, an old 10,000 ton battleship that had been the _Kurfürst Freiderich Wilhelm_ before the kaiser sold her to Turkey, was sent to the bottom of the same waters by British submarines. One of them the _E-15_ ran aground in the Dardanelles and was forced to surrender to the Turks, but before they could float her off and make use of her, two steam launches dashed upstream through the fire of the shore batteries and torpedoed the stranded submarine as Cushing blew up the _Albemarle_. But on the same day as the _E-11’s_ first exploit--May 25, 1915, the British battleship _Triumph_ went down with most of her crew off Gallipoli, torpedoed by a German submarine. The _U-51_ had made the 2400 mile trip from the North Sea, using as tenders a number of small tank steamers flying the Spanish flag. These vessels intentionally drew the attention of the cordon of British destroyers drawn across the Straits of Gibraltar and were captured, while the submarine swam safely through and traversed the Mediterranean to the Dardanelles. Two days after her first exploit, the _U-51_ or perhaps one of her Austrian consorts, sank another British battleship, the _Majestic_, off Gallipoli. The _U-51_ has been reported sunk by Russian warships in the Black Sea. [Illustration: Copyright, London Sphere & N. Y. Herald. Tiny target afforded by Periscopes in rough weather.]