FIELD WORK.
Under this heading are comprised—
First, the systematic operations of the division of mound exploration carried on east of the Rocky Mountains.
Secondly, researches in and collections from the ancient ruins of the Southwest and comparative study of the present inhabitants of that region and the objects found among them.
Thirdly, linguistic work or expeditions among the several Indian tribes at their homes, with the main purpose of acquiring knowledge of their spoken languages.
Fourthly, general studies, or those embracing various branches of inquiry, conducted among the existing Indian tribes.