Henry W. Henshaw, Animal Carvings from Mounds of the Mississippi Valley
“ For, although primitive man actually does classify all concrete things into groups, the classification is of a very crude sort, and has for a basis a very different train of ideas from those upon which modern science is established—a fact which many investigators are prone to overlook. Still there seems to be good ground for believing that the conception of a bird, for instance, in the abstract as distinct from some particular kind or species would never be entertained by a people no further advanced in culture than their various relics prove the Mound-Builders to have been. ”
