New techniques of excavation, identification and preservation, subsidized by an increasingly affluent human society, and developed during the past two centuries of archeological research have provided the needed means and manpower.

One of them, the better-dressed, was fair and obviously affluent, and the other was a labourer.

None became rich, in the strict signification of the term, though a few got to be in reasonably affluent circumstances; many were placed altogether at their ease, and more were made humbly comfortable.

He and his assistants explored, and mapped for the first time, the Juruena and the Gy-Parana, two important affluents of the Tapajos and the Madeira respectively.