A few steps ahead was found another glistening article, dropped by the passing soldiers. They knew what that was; it was the canteen, lost on the march, by a pony soldier. Wolf-Voice appropriated it. "We must not stay here; the trail is old, but the Sioux will be near the soldiers. They are between us and the white men; you may be sure of that, brother," said one; and the four ponies stumbled off through the sage-brush, melting into the night. They stopped for the day at the head of a rocky coulée, eating dried meat for fear of making a smoke. Ermine drew the paper from his pocket, laid it on the ground before him, and regarded it for a few moments; then he turned it round, seeing it was upside down by the writing on the bottom. "Bogardus," he read on the left-hand corner. The image on the card spread, opened, and flowered in Ermine's mind; it was a picture--that was plain now; it was a photograph such as he had heard Crooked-Bear tell about--an image from the sun. He had never seen one before. Wolf-Voice bent his beady eyes on the black and white thing, but it suggested nothing to him. Nature had not been black and white to his scarlet vision. The rude conventionalized lines painted on the buffalo-robes differentiated buffalo, ponies, and men, but this thing--"Humph!"--he lighted his pipe. Before the persistent gaze of Ermine the face of a young woman unravelled itself from a wonderful headgear and an unknown frock. The eyes looked into his with a long, steady, and hypnotic gaze. The gentle face of the image fascinated the lad; it stirred his imagination and added "a beautiful white woman" to his "ten-thousand-dead-men" quest. Wolf-Voice had to call him twice to take his watch, saying as he lay down, "Put the paper away, brother; it takes your eyes from the Sioux." The travellers could not make long journeys in the short summer nights through the open country, and exercise a proper vigilance at the same time. The moon rose later every night, thus cutting their time. Neither did they see any signs of human beings or know where to find the white men; but recourse to the trail along the river, from time to time, assured them that the wagons had continued down the stream. The trail was very old, and was full of Indian pony-tracks which had followed it. One day as they lay in a washout, Wolf-Voice pointed to columns of dust far to the south. Was it buffalo, Indians, or soldiers? The dust stayed all day in one place; it might be a buffalo-surround or big herds about camps, but this they were not able to determine.