“ They are vaguely divided into two tribes or sub-tribes, known respectively as Unalaska and Atka. They are strong and agile, capable of enduring great fatigue and extremes of heat and scold, and are peaceful and cheerful. They subsist by hunting and fishing, using implements of wood, ivory, bone, and stone, with the two types of Eskimo water craft (kayak and umiak) ; their summer habitations are tents or huts like those of the mainland Eskimo, while in winter they occupy huts of stone, snow, or other material, or (especially on Fox Island) underground dwellings. ”

“ Several volcanoes are periodically active, and warm volcanic springs are numerous. Cool springs are frequent and form broad, rapid streams, which empty into adjacent bays or collect in rocky depressions and form lakes which discharge their water into the sea by natural channels. ”