hurried down to 90 feet after the shot, heard depth-charges exploding after her. Whether she hit with the last shot or not is doubtful. In the midst of the depth-charges it is impossible to differentiate and locate a torpedo explosion. But the _Westfalen_ was got home and into dock. As soon as the chase had ceased, "E 23" rose and signalled the news of the High Sea Fleet's venture to the Grand Fleet, but on the latter's approach the enemy had turned back from the mouth of the Bight and passed home by the Northern Channel. During the attack on the Fleet "E 23" had a perfect view in clear weather of all the ships, and was able to note all funnel bands and distinctive markings on them, and to recognise each unit of the great Armada as it crossed the periscope field. The big "K" class submarines were used for scouting patrols in 1917 and 1918. This was not because we were short of boats, but because it was known that if boats don't get in sea-time they tend to become inefficient--also, perhaps it was known that we would have plenty of warning from the Intelligence Department if the High Sea Fleet moved, and so could call the "K's" home to refill with oil in readiness if a fleet action was likely. The "K" patrols were on lines between the Bight and our coast which enemy raiders or mine-layers would be likely to cross if they came out. Except for practice dives at dawn and evening, the boats stayed on the surface all the time, zigzagging up and down their patrol lines at 17 knots. Apart from occasional U-boats or our own ships nothing was seen, and the work done was like most of the patrol work of the war--very dull, but useful and necessary. The boats, however, were able to test their own behaviour in bad weather on several occasions, with the result that weak points could be eliminated or strengthened, and the design modified and made more seaworthy. A K boat in a gale is a very handsome ship, her smooth run and fine lines slide the seas off very prettily, and if her speed is eased to suit the length of the sea she rides like a cruiser. It is true that she is not comfortable in bad weather: in the boiler-room the stokers have to wear oilskins because of the water pouring down from the vents overhead, and big seas sometimes come down the funnels, causing "flashing-back" and scalding; the water tumbles down the conning-tower hatch, splashing off the control-room deck and causing "earths" on adjacent switchboards, with the result that men going up and down the conning-tower ladder are greeted with shocks as soon as they grasp the rungs.