"Can't your men shelter in the galleries from the enemy's bombardment?"

"For a little while, no doubt. But what I'm afraid of is that the enemy will find some means of crossing the river during the night: if they do it's all up. There appears to be a general directing operations, and after being baulked for a week he won't be satisfied until he's made a clean sweep of us."

"It's touch and go, evidently. What do you say, Fenton?"

"We couldn't do thirty miles on this ground in less than six hours if the horses were fresh: and if we push on at once they'll collapse before we're half way there. We must have at least a three hours' rest."

The Major pulled at his moustache meditatively.

"Aren't we near that place where you had your smash, Appleton?" he said suddenly.

"Yes; it's a few miles down."

"Then I'll tell you what I'll do. A lot of these fellows with me are used to work on the Indus. I'll get them to make a big raft like the one your Kalmucks floated the aeroplane on, and send on a dozen in advance. The current will gain us three miles an hour; the men should get to the neighbourhood of the mine about three. If you could manage to meet them and carry them in relays into the mine they'd be of great use. I'll give you some ammunition, too. Fly back at once: the knowledge that we're coming will buck your men up; and the rest of us will hurry on as soon as possible."

On reaching the aeroplane, the whole force dismounted. Lawrence was introduced to Captain Coats, the army surgeon whom he had heard mentioned in the frontier house. While some of the men placed in the cockpit as many cartridges as it could carry, others went into the wood to cut timber for the raft. Lawrence had some difficulty in starting the engine; but it ran smoothly after a little while, and taking a cheery leave of the officers he started for the north.

He had come within about five miles of the mine when a prolonged miss-fire made it imperative to descend at once. Luckily there was just room for him to alight at the edge of a small wooded tract. He was the more perturbed at the delay because he heard distinctly the dull rumble of artillery fire in the north. Stripping off his coat, he began with Fazl's help to overhaul the engines. Apparently the defect was in the carburetter, but for some little time the precise origin of the mis-fire was undiscoverable. Meanwhile the depths of the valley were already shrouded in dusk, and Lawrence, never having attempted a flight by night, became more and more anxious as time went on, lest he should be overtaken by complete darkness before he regained the platform.