"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."

Daglish, a young, spirited, and handsome cavalry officer, dropped his glasses and let them dangle about his neck, while he turned impatiently towards Geoff.