As no bearers or carriers were to be secured, it was essential to persuade the Tejadas to take their pack mules up as far as the snow, a feat they declined to do. The mules, Don Pablo said, had already gone as far as and farther than mules had any business to go. Soon after reaching camp Tucker had gone off on a reconnaissance. He reported that there was a path leading out of the canyon up to the llama pastures on the lower slopes of the mountains. The arrieros denied the accuracy of his observations. However, after a long argument, they agreed to go as far as there was a good path, and no farther. There was no question of our riding. It was simply a case of getting the loads as high up as possible before we had to begin to carry them ourselves. It may be imagined that the arrieros packed very slowly and grudgingly, although the loads were now considerably reduced. Finally, leaving behind our saddles, ordinary supplies, and everything not considered absolutely necessary for a two weeks' stay on the mountain, we set off. We could easily walk faster than the loaded mules, and thought it best to avoid trouble by keeping far enough ahead so as not to hear the arrieros' constant complaints. After an hour of not very hard climbing over a fairly good llama trail, the Tejadas stopped at the edge of the pastures and shouted to us to come back. We replied equally vociferously, calling them to come ahead, which they did for half an hour more, slowly zigzagging up a slope of coarse, black volcanic sand. Then they not only stopped but commenced to unload the mules. It was necessary to rush back and commence a violent and acrimonious dispute as to whether the letter of the contract had been fulfilled and the mules had gone "as far as they could reasonably be expected to go." The truth was, the Tejadas were terrified at approaching mysterious Coropuna. They were sure it would take revenge on them by destroying their mules, who would "certainly die the following day of soroche." We offered a bonus of thirty soles--fifteen dollars--if they would go on for another hour, and threatened them with all sorts of things if they would not. At last they readjusted the loads and started climbing again.