It nettled Dean--frank, outspoken, straightforward as he had always been. He hated any species of backbiting, and he had heard of Burleigh as an adept in the art, and a man to be feared. Signaling to his sergeant to keep the column opened out, as the prairie was almost level now on every side, he rode swiftly on, revolving in his mind how to meet and checkmate Burleigh's insidious moves, for instinctively he felt he was already at work. The general in command in those days was not a field soldier by any means. His office was far away at the banks of the Missouri, and all he knew of what was actually going on in his department he derived from official written reports; much that was neither official nor reliable he learned from officers of Burleigh's stamp, and Dean had never yet set eyes on him. In the engineer he felt he had a friend on whom he could rely, and he determined to seek his counsel at the campfire that very night, meantime to hold his peace. They were trotting through a shallow depression at the moment, the two spring-wagons guarded and escorted by some thirty dusty, hardy-looking troopers. In the second, the yellow ambulance, Brooks was stretched at length, taking it easy, an attendant jogging alongside. Behind them came a third, a big quartermaster's wagon, drawn by six mules and loaded with tentage and rations. Out some three hundred yards to the right and left rode little squads as flankers. Out beyond them, further still, often cut off from view by low waves of prairie, were individual troopers riding as lookouts, while far to the front, full six hundred yards, three or four others, spreading over the front on each side of the twisting trail, moved rapidly from crest to crest, always carefully scanning the country ahead before riding up to the summit. And now, as Dean's eyes turned from his charges to look along the sky line to the east, he saw sudden sign of excitement and commotion at the front. A sergeant, riding with two troopers midway between him and those foremost scouts, was eagerly signaling to him with his broad-brimmed hat. Three of the black dots along the gently rising slope far ahead had leaped from their mounts and were slowly crawling forward, while one of them, his horse turned adrift and contentedly nibbling at the buffalo grass, was surely signaling that there was mischief ahead. In an instant the lieutenant was galloping out to the front, cautioning the driver to come on slowly. Presently he overhauled the sergeant and bade him follow, and together the four men darted on up the gradual incline until within ten yards of where the leaders' horses were placidly grazing. There they threw themselves from saddle; one of the men took the reins of the four horses while Dean and the other two, unslinging carbine and crouching low, went hurriedly on up the slope until they came within a few yards of the nearest scout.