"We came upon the tracks of the aeroplane some miles up; there was litter of all sorts about--scraps of food, broken branches and what not, and I feared you’d smashed yourself and your machine, only we couldn’t find any pieces of it. But we found your rifle and field-glass in a little hollow, and the Gurkha guessed that you had tumbled among the Kalmucks. An hour after dark we caught sight of the camp-fire. The Gurkha volunteered to creep up and reconnoitre, so the rest of us halted, waiting for his report. "He’s a clever little chap, with a double dose of Gurkha courage. He came back very soon and told me he’d seen you tied up among them, and about the raft and so on. My sowars wanted to rush the place, but it struck me that that might be the end of you. The first instinct of such barbarians would be to knife their prisoner. It was a bit of a quandary--and the Gurkha came out strong again. It was his suggestion that he should creep into the camp and release you before we moved." "Plucky little chap!" said Lawrence warmly. "A treasure! The noise of the scuffle brought us up hot-foot, and the only thing I regret is that, as the Gurkha informed me, the ringleaders, those rascally miners of yours, got away.... Now the sooner we get to your mine the better. You had better sit my horse. As all our food is gone, we shall have a strong motive for hurry, so we ought to get home before night. Of course if you think you can’t stand it we’ll take our time." "No: I’m fit enough. Your men will look after the raft?" He explained the method by which the aeroplane had been taken safely past the gorges, and the Major went off to instruct his men. Lawrence summoned Fazl, who was resting on a grassy knoll overlooking the river. "I owe you my life; you’re a brave fellow, and I thank you," he said. Fazl’s plastered face broadened in a grin. "Wah! sahib, the Kalmucks are pigs, and their hearts melt like butter. The sahib’s servant is unworthy of praise. It is a small thing to do for the heaven-born." CHAPTER THE TWENTY-FIRST THE FRONTIER HOUSE Some ninety miles southward of the tower in which Major Endicott had been besieged, on the bare summit of a low hill, stood a solitary building of stone, known to the British officers of the borderland as a frontier house. It had no pretentions to architectural excellence, consisting of a square tower, somewhat resembling a truncated chimney-stack, crowned by a small turret on a platform, which looked like a square straight-brimmed Quaker hat. Adjoining the tower was a sloping wall twenty feet high, that formed one side of an enclosure, within which were a number of rudely built huts, set up against the inward side of the wall. Neither tower nor wall had any windows, but in the latter a doorway gave entrance to the interior.