In the excitement of the moment nobody noticed or paid any attention to a gleaming line of white froth that came creeping down the river, stretching from bank to bank like a newly formed snow-drift. Suddenly a rifle-shot rang out from the bank they had left, then another, and then a dozen at once. The Indians had discovered their flight, and were firing angrily in the direction of the sounds in the river. The teamster sprang from his saddle, and, cutting the traces of his mules, started them towards the shore, leaving the wagon to its fate.