A moment after he disappeared in the stable the

  The Indian called to him from the grade, and Mahon unlatched the door and let him in. Grabbing another handful of cartridges, the Indian got the stable key and dashed away through the back door. A moment after he disappeared in the stable the two defenders of the kitchen saw a pair of bohunks run out into the dim morning light and make at mad speed for the few trees that grew in the bend of the river. Even as Constable Williams was taking aim, the man covered fell to a bullet from the stable. The other, apparently beyond the angle of the Indian's range, seemed certain to escape. The Policeman rested his rifle on the window sill. But Murphy gave a joyous whoop and started for the door.   "Glory be, I see some one to foight at last!"   Williams was forced to drop his rifle and catch the excited Irishman in his arms. And the bohunk disappeared into the dimness of the morning.   The Indian, having freed the stable of lurkers, returned to the kitchen. But not for long. A burst of rifle fire in a new direction sent him hastily out again beside the trestle. The men who had retired from the stable before his rifle had discovered a way to the river bottom in the rear and were now from below potting at the recumbent contractor through the sleepers.   Daylight had come suddenly, as it does in the West. The glare of the sun was rising above the trees, and over the snap of the rifles rang the songs of birds. The shack stood fully exposed in the open, while the attackers slunk in the protection of the trees.