There was the vast, precipitous gorge along the side of which wound the broad path that had been traversed by hundreds of men and animals, and along which the Express Riders had galloped at headlong speed times without number. There were scores of places among the towering rocks and piles of stone that would hide a host of miscreants from sight. The fatal arrow might have been launched from any one of them, and the youth could not guess which. At any rate no dusky head showed itself. The weapon that had been used gave out no sound and whether there was one assassin or a dozen must remain unknown to Alden.