Just at the time when these operations were being completed, Lieutenant Sandford's submarine succeeded, despite the terrific artillery fire, in reaching the open-work part of the mole, where she was blown up, shooting flames to a height of nearly 5,000 feet, and making a breach over 60 feet wide in the jetty. A motor-boat picked up her crew. A German torpedo-boat and the _Brussels_ were sunk by motor-launches. _(The "Brussels" was captured by the Germans on June 24, 1916. Her commander, Captain Fryatt, was shot on July 27, for having rammed the German submarine U-33)._ [Illustration: _The open-work portion of the Mole destroyed by the British submarine, (Lieut. Sandford). Inset: temporary bridge built by the Germans and destroyed by them before their retreat._] The _Vindictive's_ siren recalled the landing-party, who succeeded in bringing back most of their killed and wounded. The flotilla then weighed anchor and returned to Dover. The operation had succeeded as well as could be expected. The two cruisers, although displaced slightly later by the Germans, blocked the channel, making it impossible for ships of other than light draught to go through. The _Thetis_ also helped to obstruct the entrance to the channel. [Illustration: +British Graves in Zeebrugge Cemetery.+ _The cross bears the following inscription (in German): "Three English officers, seven English marines, two English sailors, two English stokers"._] [Illustration: +The end of the Wharves and the Lighthouse Pier.+ _The upper view is looking from the lighthouse; the lower view takes in the whole of the roadstead. See photos, pp. 76 and 77._] [Illustration: +A nest of submarines with their shelters of reinforced concrete.+ _These were the only shelters, built by the Germans at Zeebrugge, which they failed to destroy before retreating._] _Cars can go to the end of the wharves on the mole._ Right and left of the entrance to the jetty are two 6in. guns on concrete platforms _(photo, p. 75)_. Next comes the open-work part, repaired by a temporary bridge built in the first instance by the Germans to replace that part of the jetty destroyed by Lieut. Sandford's submarine, and later rebuilt by the Belgians, after the Germans had destroyed it previous to retreating _(photos, p. 90)_. The tourist now arrives at the mole, on the right side of which are the wharves with their sidings, sheds and cranes which were damaged either by air-raids and the British attack, or by the Germans previous to their retreat. On the left are concrete shelters which were used by the gunners for storing shells, etc. During the German occupation, the enemy's torpedo-boats and submarines were moored alongside the wharves. Along the elevated side-walk are a battery of four 3½in. guns and a number of 6in., 4in., 3in. and 1½in. guns. The entrance to the channel, with the sunken cruisers and the "_Thetis_" stranded in front of them, can clearly be seen from the side-walk.