From A Land So Strange: The Epic Journey of Cabeza de Vaca, by Andrés Reséndez (Basic Books, 2007), Kindle pp. 189-192:
As they traveled, the castaways continued to burnish their reputation as healers. Cabeza de Vaca in particular became more confident in his skills. He became bolder in his interventions; he was no longer content merely to pray and blow. The medical procedures he employed may go some way toward explaining his success. Not far from the Rio Nadadores, he treated a man who had been struck by an arrow below the shoulder. “I touched him and felt the point of the arrow, and I saw that it had passed through the cartilage,” Cabeza de Vaca writes with the precision of a surgeon, “and with a knife that I had, I opened his chest to that place. And I saw that the point had passed through and was very difficult to remove. I again cut deeper, and I inserted the knife point, and with great difficulty, at last I pulled it out. It was very long. And with a deer bone, plying my trade as a physician, I gave him two stitches, and after that he bled a great deal and with scraps of hide I stopped the bleeding.” After the surgery, the patient claimed that he no longer felt pain. The arrowhead was passed around throughout the land, and everyone was amazed by the miraculous cure that Cabeza de Vaca had bestowed. The travelers’ authority over the peoples of central Coahuila became great indeed.
They never traveled alone. Since crossing into northern Tamaulipas, they, and their string of indigenous hosts, had worked out a system that was part processional, part doctor’s visit, and part plunder. It must have been a marvel to behold. When the strangers arrived in each new Indian community, it set an elaborate series of rituals in motion. The natives would offer shelter, food, and gifts to the four men in exchange for access to their healing powers. Festivities would follow, sometimes for days. Then, reluctant to see the medicine men go, the Indian hosts would insist on traveling with them to the next settlement.
The four survivors had set ideas about where they wanted to go: first due south toward Pánuco, and then due west toward the metal-working peoples. They could not, however, simply dictate their route. Their Indian sponsors had their own notions and constantly tried to steer the drifters toward their friends and away from their enemies. The route actually taken by Cabeza de Vaca and his companions was often the result of complicated negotiations, and occasionally of deception. A native group by the Sierra de Pamoranes, for instance, tried to dissuade the four men from going inland by falsely claiming that there was neither food nor people in the direction the healers wished to travel. In that case the wanderers paid little attention and pursued their inland course. Yet in general they were not immune to such subtle manipulation, as they depended entirely upon their indigenous followers for information and knowledge about the terrain and geography of the region.
Each time the explorers approached the next indigenous settlement on their journey, a curious exchange would ensue. Those who had accompanied the medicine men would pillage the new hosts, entering their huts and plundering whatever possessions or food they could carry back to their own encampment. In return, they left the medicine men. A certain sense of reciprocity undergirded the entire transaction, yet the details were unsettling for the explorers. They were initially taken aback by this custom when they first witnessed it in northern Tamaulipas. They were distressed by how badly the new hosts were treated and feared that the widespread sacking would lead to serious altercations. Yet their fears turned out to be unfounded as the plundered Indians offered reassurance. “On seeing our sadness,” Cabeza de Vaca writes, “[they] consoled us by saying that we should not be grieved by that because they were so content to have seen us that they considered that their possessions had been well employed, and that farther ahead they would be compensated by others who were very rich.” And indeed, a few days later the erstwhile victims would plunder the villagers that followed, “and the ones always sacked the others, and thus those who lost, like those who gained, were very content.”
Precise instructions about how to deal with the healers were also passed down from group to group. The hosts were told to lead the foreigners onward, always treating them “with great respect and being careful not to anger us in anything,” Cabeza de Vaca writes, “and to give us everything they had, and to take us where there were many people, and that wherever we arrived to steal and loot what the others had because such was the custom.” Soon the “new custom” became so entrenched and so well known that native villages on the way began to take precautions like hiding their most valuable possessions in advance of the procession’s arrival. Reverence and intimidation were closely intertwined. An approaching band bent on plunder could easily cower villagers into surrendering their possessions and venerating the four outsiders.