The Spell of the Rockies by Enos A. Mills

Twenty-four years ago, while studying glaciation on the slope of Long's Peak, I came upon a cluster of eight beaver houses. These crude, conical mud huts were in a forest pond far up on the mountainside. In this colony of our first engineers were so many things of interest that the fascinating study of the dead Ice King's ruins and records was indefinitely given up in order to observe Citizen Beaver's works and ways.

The industrious beaver builds a permanent home, keeps it clean and in repair, and beside it stores food supplies for winter. He takes thought for the morrow. These and other commendable characteristics give him a place of honor among the horde of homeless, hand-to-mouth folk of the wild. His picturesque works add a charm to nature and are helpful to mankind. His dams and ponds have saved vast areas of soil, have checked many a flood, and helped to equalize stream-flow.