Perhaps you think that the Navy ought to protect coast towns from sudden raids. You must remember that the business of the Navy is to destroy the fleets of the enemy, and that it must always be ready to give battle whenever occasion offers. Were our warships to be strung out along the coast for the protection of towns, they would be an easy prey; they would be quite unable to concentrate rapidly in order to meet the enemy when he came out in strength or to fall upon him in the open sea on his way to or from an attack on our coasts. During the month of October, when the German guns thundering against Ypres could be heard across the Channel, we began to prepare seriously against raids and even invasion. Mine fields were laid along the threatened shores, and within easy reach of all possible landing-places Yeomanry and Territorials were stationed, trenches were dug, wire entanglements were erected, and anti-aircraft guns were mounted. Over and over again there were false alarms that the enemy were coming. In the early days of November he made his first appearance. Late on the afternoon of 2nd November eight German warships steamed out of the mouth of the Elbe, and cleared for action, ready for a descent upon the east coast of England. Probably some of the many German spies who then swarmed in the eastern counties had reported that the coast was clear, and that a sudden swoop had every prospect of success. The squadron consisted of the _Seydlitz_, the _Moltke_, and the _Von der Tann_, battle cruisers; the _Bluecher_ and the _Yorck_, armoured cruisers; and the _Kolberg_, the _Graudenz_, and the _Strassburg_, light cruisers. All but the _Yorck_ could steam 25 knots an hour, and the battle cruisers mounted 11-inch guns. Early on the morning of the 3rd they ran through the nets of a fishing fleet about eight miles east of Lowestoft, and sighted an old coast patrol boat, the _Halcyon_. Shots were fired at her, but she managed to get away unpursued, with her wireless apparatus, bridge and funnel damaged, and one man wounded. By eight in the morning the German ships were ten miles off Yarmouth, and had begun to aim their guns at the wireless station and the naval air station. Their shells ploughed the beach or plumped harmlessly into the sea. For a quarter of an hour they kept up their cannonade without doing any damage. Then they retired, and while doing so threw out mines to prevent pursuit. Later in the day a British submarine, D5, ran on one of these mines and was blown up. Before the voyage ended the engineer was hoisted on his own petard.[185] The _Yorck_ collided with another of the mines, and went to the bottom with all her crew.