At twenty minutes to two, Admiral Beatty turned homeward. The German cruisers Mainz, Koln, and the Ariadne had been sunk; the Strasburg was seriously damaged. One destroyer was sunk, and at least seven seriously injured. About seven hundred of the German crew perished and there were three hundred prisoners. The British force returned without the loss of a single ship. The Arethusa had been badly damaged, but was easily repaired. The casualty list was thirty-two killed and fifty-two wounded. The battle was fought on both sides with great gallantry, the chief glory belonging to the Arethusa and the Fearless who bore the brunt of the battle. The strategy and tactical skill employed were admirable, and the German admiral, Von Ingenohl, from that time on, with one exception, kept his battleships in harbor, and confined his activities to mine laying and the use of submarines. In the first days of the war the German mine layers had been busy. By means of trawlers disguised as neutrals, mines were dropped off the north coast of Ireland, and a large mine field was laid off the eastern coast of England. One of the most important duties of the Royal Naval Reserve was the task of mine sweeping. Over seven hundred mine-sweeping vessels were constantly employed in keeping an area of 7,200 square miles clear for shipping. These ships swept 15,000 square miles monthly, and steamed over 1,100,000 miles in carrying out their duties. In spite of all these precautions many English ships were destroyed by the mines. It would be hard to overestimate the effect of the British blockade of the German ports upon the fortunes of the war. The Germans for a long time attempted, by the use of neutral ships, to obtain the necessary supplies through Holland, Sweden, Norway and Switzerland. Millions of dollars’ worth of food and munitions ultimately reached German hands. The imports of all these nations were multiplied many times, but as the time went on the blockade grew stricter and stricter until the Germans felt the pinch. To conduct efficiently this blockade meant the use of over 3,600 vessels which were added to the auxiliary patrol service. Over 13,000 vessels were intercepted and examined by units of the British navy employed on blockade channels. The Germans protested with great vigor against this blockade, and ultimately endeavored to counteract it by declaring unrestricted submarine warfare. In fact, Great Britain had gone too far, and vigorous protests from America followed her attempt to seize contraband goods in American vessels.