Fortunately, Glen was close beside his companion. With a quick movement he grasped Binney by the collar and jerked him to one side, so that he very nearly fell off his mule. At the same instant the two arrows, that he had seen fitted to their bowstrings, whizzed harmlessly over the boys' heads. As Nettle and the mule sprang away up the slope, several rifle-balls, from the little party of Indians on the right, whistled past them; while from behind them rose a howl of mingled rage and disappointment. The first two Indians had used the noiseless arrows, in the hope of killing the boys without betraying their presence to the rest of the party, as the moment for the grand charge, that they hoped would be such a complete and overwhelming surprise, had not yet arrived. Now that they had failed in this, there was no longer any need for caution, and they fired shot after shot from their rifles after the fugitives.