almost close enough to join in, Mel saw a spurt of flame and a gust of smoke lick out from the fuselage of the Hun. The machine lurched, recovered, and dipped over to dive down; the "Minnenwerfer" leaped in to give her the death-blow, and under the fresh hail of bullets the Hun plunged steeply, with smoke and flame pouring up from the machine's body. The wind drove the flames aft, and in two seconds she was enveloped in them, became a roaring bonfire, a live torch hurtling to the ground. The Trichords saw her observer scramble from his cockpit, balance an instant on the flaming body, throw his hands up and leap out into the empty air, and go twisting and whirling down to earth. A Hun Archie shell screamed up past the hovering Trichords and burst over their heads, and others followed in quick succession as the two turned and began to climb in twisting and erratic curves designed to upset the gunners' aim. They worked east as they rose and were almost over the lines when Mel, in one of his circlings, caught sight of a big formation flying towards them from the west. He steadied his machine and took another long look, and in a moment saw they were Huns, counted them and found fourteen, most of them scouts, some of them two-seaters of a type that Mel knew as one commonly used by the Huns on the infrequent occasions they get a chance to do artillery-observing work on our lines. Both Mel and Rip worked out the situation on much the same lines, that the Huns had some important "shoot" on, were specially keen to do some observing for their guns, had sent the four two-seaters first and were following them up with other two-seater observing-machines protected by a strong escort of fighters. Mel looked round for any sight of a formation of ours that might be ready to interrupt the game, saw none, and selecting the correct coloured light, fired a signal to Rip saying, "I am going to attack." Rip, as a matter of fact, was so certain he would do so that he had already commenced to climb his machine to gain a favourable position. The fourteen were at some 17,000 feet, several thousand above the Trichords, but here the great climbing power of the Trichords stood to them, and they went up and up, in swift turn on turn that brought them almost to a level with the enemy before the Huns were within shooting distance. They came on with the scouts flying in a wedge-shaped formation, and the observing-machines protected and covered inside the wedge.