Document 3
 . . . Other problems faced by wagoners [settlers] included howling wind, battering hail and
 electrical storms, lack of sufficient grass for the oxen, and wagon breakdowns. The forty waterless
 miles across the hot, shimmering desert between the Humboldt Sink and the Truckee River in
 Nevada exacted its toll of thirst on men and oxen. Rugged mountains of Idaho, Oregon, and
 Washington debilitated [weakened] men and animals. On the California branch loomed the
 Sierra Nevada, a formidable barrier of sheer granite. So high and perpendicular towered these
 granite walls, that wagons had to be dismantled and hoisted by rope, piece by piece, over
 precipices seven thousand feet above sea level. On some wagon trains, supplies ran low or
 became exhausted. Aid from California saved hundreds of destitute and emaciated pioneers. The
 story of the ill-fated Donner party that lost half its roster to starvation, freezing cold, and deep
 snows just east of Donner Pass in the Sierra Nevada is well-known. The great westward
 adventure was not for the weak, the timid, the infirm. One emigrant graphically recorded a small
 incident along the trail:
 On the stormy, rainy nights in the vast open prairies without shelter or cover, the deep
 rolling or loud crashing thunder, the vivid and almost continuous flashes of lightning, and
 howling winds, the pelting rain, and the barking of coyotes, all combined to produce a
 feeling of loneliness and littleness impossible to describe. . . .
 Source: H. Wilbur Hoffman, Sagas of Old Western Travel and Transport, Howell North Publishers, 1980
 According to H. Wilbur Hoffman, what are two examples of how geography negatively affected the
 westward movement of settlers?