Particularly notable is his description of the wonderful wourahli (urari) poison, its extraordinary effect, and the _modus operandi_ of its making; a poison used extensively by Amazonian tribes but not made by all.
The supply of wourahli poison had run low and three wourahli men were to go out in the forest to collect poison plants, a journey which would require several days to complete.
The wourahli men set me off near the mouth of the Branco River, at a distance which I covered in less than five hours by following the banks.
These bones, about three and a half inches long, were smeared with wourahli poison, and thus rendered absolutely fatal even when inflicting only
These bones are slightly touched with wourahli poison and, concealed as they are under dead leaves, they inflict severe wounds on the bare feet of the _caboclos_, and death follows within a short period.