The preceding statements show that the preparation, enjoyment and effect of ayahuasca and the ceremonial associated with the narcotic beverage follows the material which has been known and can be grasped in a similar form. In addition, their penetration in the Chama and Tacana groups is clearly still historically conceivable the treated area, by having been unknown among them even earlier after the natives had been killed, and then, only by representatives of the oldest generation of them, by Peru via Maldonado, in the world image complex they had been built and further conveyed. Results of the 24th Frobeniua Expdition, which was carried out in 1952-54 with the support of the German Federal Ministry of the Interior; the German Research Foundation and the Wenner Gren Foundation, New York, in Bolivia.