The Indian, safe from pursuit, answered it with a derisive whoop, and, turning his body around, still going swiftly, waved his rifle triumphantly aloft in his right hand and, looking back, leaned for an instant with the other on the blue mare's croup!
The horse obeyed the sign like a flash. As if the eldest brother's shot had found her heart, she stopped dead still and threw herself upon the ground,—and Black Cloud, his face for once almost white, lunged forward, struck his head with crushing force against a boulder on the river's edge, and lay as motionless as the rock itself!
Early that night, when the prairie lay still and sweet, and the new moon was swimming westward from cloud-island to cloud-island, the gray buffalo-wolves came up the Vermillion on their way to the sheep-pen of the Swede, and waked the drowsing valley with their howling. But the trembling ewes and their babies were not molested; for when the pack reached the river bank near the farthest slough, they halted to quarrel at a boulder—till the sun came up in the east again and glittered on a string of glass wampum lying beside the rock.
XII
THE PROFESSOR'S "FIND"
A NIMBUS of mystery clung to the professor the first two days of his stay. His arrival, late one afternoon, in the sewing-machine man's buggy, was as unexplained as it was unexpected; and when he was shown to the little girl's room, which she hospitably relinquished, he volunteered neither his name nor his place of residence. The following morning he left the house, carrying a small paper box and a black hand-bag, and crossed the fields to the prairie, where he ran about, his spare figure stooped, as if he were picking something, while his left hand held an instrument that flashed in the sun. On his return at noon, his box and bag were closed, and only a green stain on his fingers gave any suggestion of what he had been doing. He spent the remainder of the day quietly in his room.
The big brothers made various conjectures about him. The eldest declared that he was searching for minerals; the biggest thought him a government agent on a secret mission; while the youngest, to the terror of the little girl, who had not recovered from her adventure of a month before with Black Cloud, hinted at a dark purpose and openly asserted that it was dangerous to have the professor in the house. But, since their mother would not permit any questioning, their curiosity was not satisfied nor their fears allayed until the professor, unasked, revealed his identity.