"Oh yes! I told the Major I’d return to cover his march." "Let me have a look at it." He opened up the engine, examined all its parts, started it. "It seems to be working all right. I don’t see any grit; if there was any it’s been got rid of. If it should happen again you had better plane down and wait till the Major reaches you; but I don’t think you’ll have any trouble." As Lawrence got into his place, he recollected the bombs that lay beneath the seat that Fazl had occupied. "Shift those, Bob, will you?" he said. "It will be rather awkward without Fazl if I have to use them. Put them as closely within reach as you can. I shall have to steer with one hand and drop them with the other." "Probably you won’t have to use them at all. The Major and four men will be more than a match for those Kalmuck fellows, who must be getting famished by this time." "The Afghans may be in pursuit, though." "But the mere sight of the aeroplane might be enough for them after what has happened. Still, it’s just as well to be prepared. Bluffing sometimes doesn’t come off, and the aeroplane is useless for offensive action without the bombs. If you do find the Major fighting a rear-guard action don’t be too tender. Strike hard if you strike at all." "Well, I’ll do what I must. Don’t expect us before to-morrow night at the earliest. I shall have to come down at times, or the petrol won’t last out; and when the Major is within a few miles I’ll fly back ahead of him if all’s safe. So long!" Bob watched him out of sight. He felt a little anxious; he would have been alarmed had he known that within five miles of the mine the engine began to give trouble again. Lawrence was in two minds whether to return and have it thoroughly overhauled, or to continue on his course. But he felt that delay might be serious to the Major, and, as before, the engine might soon right itself. He kept straight on. His hopes were flattered when, after a minute or two of fitful explosions, the engine worked normally again.