"Ah, there, I hear the engines now, very faintly, though. Rolls-Royce engines too, thank God!" exclaimed Keane fervently, as he recognised the well-known sound, and knew that assistance had arrived at last, in the shape of at least one Bristol Fighter.

"It's all right, Sharpe. Cut off that beastly current. Tempest will be here in a minute."

"Are you sure it's Tempest?"

"Yes. Listen to that! Now he's cut his engine out again, and he's coming down. It's the chief right enough; I should know his flying amongst a score of aeroplanes."

The wires were cut off, a temporary landing-tee quickly rigged up on the ground, and frantic signals were made to the pilot, who was now rapidly coming down in sharp spirals.

A few minutes later the intrepid pilot flattened out above the tree tops, dipped again, banked steeply, and sideslipped almost to the ground, in order to get into the confined and narrow space which served the Scorpion for an aerodrome. Scarcely had he landed when another machine, which had followed him from England, performed the same highly-skilled manoeuvre, and taxied up to the little group.

CHAPTER XXI

THE COMING FIGHT

"Good-morning, Colonel!" cried the two airmen, saluting their chief smartly, as he still sat in the aeroplane, looking not a little crabbed and sour, as he secretly swore at the infamous stretch of ground misnamed an aerodrome; then turned his gaze upon the two airmen who had appealed for assistance.

"Morning! So this is where you young cubs spend your holidays, while the whole world is ramping at me for not catching this infernal brigand. What have you got to say for yourselves?"