A run of twelve miles from Fort Wingate brought the party to a camp, in a forest of the most stately yellow-pines they had ever seen, beside a great spring of ice-cold water--known as the Agua Fria (cold water). Here, as soon as supper was over, Glen proceeded to put his great plan into execution. The nights were now very cold, and the boy generally woke before morning to find himself shivering beneath his insufficient covering of blankets. Every night, too, since entering the mountains the party had been annoyed by the sneaking visits and unearthly howlings of wolves that hung on the outskirts of the camp from dark to daylight, every now and then making a quick dash through it, if the guard was not watching sharply, and snatching at bits of food or at anything made of leather that lay in their path. So Glen thought he would teach the wolves a lesson, which should at the same time add some of their skins to his bed-clothing; and it was for this purpose he had procured the strychnine.