The Casiquiare Indians, though easily reverting to barbaric customs, show some intelligence in the missions, work well and learn Spanish. As most missions have two or three tribes speaking different languages the language of the missionaries lets them communicate with each other. I saw a Poignave Indian talk in Castilian with a Guahibo, though both had left the jungle only three months before. Every quarter of an hour one spoke a carefully prepared phrase in which the verb, following the grammar of their own languages, was always a gerund ('When me seeing the father, the father me saying...').