"They're plumb sure ter pass through One Tree Gulch," he declared. "We c'n overtake them in the defile, goin' by way of Poison Spider Creek and the old Buffalo Trail, droppin' on 'em when they least expect us."
They saw no sign of the Indians for several miles; not even on the wide expanse of Laramie Plain. Here, however, Nick Undrell pointed to the dusty ground where the track of a horse crossed his path obliquely.
"See that, Mr. Birkenshaw?" he said, glancing along the distinct line of hoof marks. "That rider, whoever he is, wasn't dawdlin' none. Looks as if ho was makin' fer the far side of White Bull Ridge, which ain't a thousand miles from Broken Feather's village. Anybody you know? Ridin' a big horse, he is, shod by a town blacksmith. Might have started from the neighbourhood of your camp just about the time you stopped shootin'."
"Don't know nothin' about him," returned Gideon. "He ain't one of our lot, anyhow. Push along, Nick. I'm frettin' considerable about my Arab mare. Wouldn't have exchanged her fer any hoss as ever chewed grass."
"No, and I'm figurin' as Broken Feather won't be a whole lot eager to part with her, now he's gotten a cinch on her," rejoined Nick.
"Gid!" Abe Harum called from behind, "thar's dust risin' from the mouth of One Tree Gulch. If we puts on a hustle we shall drop on 'em 'fore they gets out on the open prairie."
They spurred their ponies to the gallop. They raced at top speed into the gulch, caring nothing for the clatter of hoofs, knowing that there could be no escape for the mounted Redskins up the steep hillsides. Midway along the defile, where it widened beyond a projecting spur of cliff, they saw the Indians driving the stolen herd of horses before them, urging them with yells and stinging quirts.
Nick Undrell divided his forces into two companies, giving them instructions to ride forward, one on either flank of the enemy, with the endeavour to head them off. Nick himself, with Abe Harum, was to remain in the rear, as support, while Isa Blagg and Gideon Birkenshaw were, if possible, to work their way round to the captured ponies and cut them off from the Indians, to be rounded-up after the expected fight.
Gideon so far succeeded in his object as to get in advance of the Redskin rearguard. By riding obliquely down the slope towards them, he might now hope to place himself between them and his ponies.
He spurred his horse, holding his revolver ready for instant use. But as he rode forward he caught sight of Broken Feather, mounted on the Arab mare, and impulsively he resolved to recapture Sultana at all risks. He drew rein. On the instant his obedient pony swerved.