"He's a find," declared one of the Staff Officers, "and I'll eat my hat if young Keith doesn't prove a most promising officer!" But that was a question for the future. To make good resolutions, to register silent vows, is, after all, a very easy matter, and one to which we all of us are prone. Promises are, we know, very much like pie-crust, so easily are they broken, and good intentions and vows, made ever so solemnly and so secretly, are difficult to keep. Would Geoff, with all his youthful enthusiasm, with all his keenness, with his undoubted steadiness of character, do well? Or would he prove only an egregious failure? "Trot!" The command rang out loudly, and in a moment the troops of horse were swinging away across the now fast-opening desert, their horses' feet kicking up clouds of sandy dust and gravel debris. Those palms were left behind in a trice it seemed, and within half an hour the landing-place was little more than a memory. It was perhaps two hours later when an officers' patrol, which had been riding well in advance, signalled the troops to halt, and one of their number came back at a gallop. "A strong force of horsemen away on our left front, sir," he reported. "Turks, I think, but I am by no means certain." "Halt! Mr. Keith, you will ride forward to the patrol, and if necessary beyond them. Let me have your report at the first possible moment," came the sharp order. A second later Sultan was bounding forward, and in a little while Geoff had joined the officers' patrol at the point where they had now halted. Yes, there was a force of horsemen away in front, and to all appearances the campaign in Mesopotamia was about to open. CHAPTER IV The First Encounter "There! Over there you can see a mass of horsemen, and I think there are infantry just behind them," said Daglish, one of the officers forming the patrol which had gone out in front of the two troops of Indian Horse sent out to reconnoitre. When Geoff pulled up his Arab, Sultan, he found close beside him the young officer who had just spoken, standing with his reins hooked over one arm, his feet wide apart and sunk almost to the ankles in the soft sand of the desert, and his glasses glued to his eyes, as he surveyed the ground to his left front, adjacent to the River Shatt-el-Arab. "Hang it!" Geoff heard him say as he too dropped from his saddle and let his reins fall on Sultan's neck--for Sultan had been trained by the knowing and experienced Joe Douglas to stand as still and as steady as a rock without a rider, so long as his reins were left in that position. "Hang it, Keith! there's a sort of a mist out there, and while just a second ago I could have sworn that there were several hundred horsemen, either Turkish or Arab, there is now nothing but shimmering water and palm-trees and houses, and a devil of a big village."