The aviators on this occasion were Squadron-Commander Spencer-Grey and Flight-Lieutenants Marix and Sippe, all belonging to the Royal Navy. The last-named had trouble with his engine shortly after starting and had to drop out, but the remaining two rushed along through the growing light--the start had been made at the first streak of dawn--Grey making for Cologne and Marix for Düsseldorf. There was a good deal of fog, which, while it served them to a certain extent by concealing their approach, at the same time made it no easy job to steer a correct course. Travelling at 80 miles an hour Grey reached Cologne, but had no luck. Owing to the fog he was unable to locate the Zeppelin shed of which he was in search, and would not drop a bomb without a definite and legitimate objective, for fear of harming women and children. He, however, was able to do some damage to the railway station. As for Marix, he found his way to the shed already struck by Collet. Rising to a great height, he made a spiral dive at the tremendous speed of 140 miles an hour. He had been seen some time before, and was greeted with a tremendous fusillade from machine-guns, anti-aeroplane guns, and rifles. His machine was struck several times, but he descended to within 500 feet of the shed to which a Zeppelin had been recently removed from that damaged by Collet, let go his bombs, and shot upwards again with marvellous velocity. As he went he saw that at least one of his projectiles had scored a success, for a volcano of flame was spouting 500 feet into the air. There was one Zeppelin the less. His "mount" had been hit no less than twenty times and two of his control-wires cut, but by the exercise of great judgment and skill he contrived to travel for 10 miles on his way back and to get across the frontier, where he was met by a Belgian car and taken safely to Antwerp.