The Gila emigrants spoke with horror of the Great Desert west of the Colorado--a land of drought and desolation--vast salt plains and hills of drifting sand; the trails which they followed sown white with bones of man and beast. Unburied corpses of emigrants and carcasses of mules who had preceded them, making the hot air foul and loathsome. Wo to the weak and faltering in such a journey! They were left alone to die on the burning sands. On the Sonora route, one of the party fell sick, and rode on behind his companions, unable to keep pace with them for several days, yet always arriving in camp a few hours later. At last he was missing. Four days after, a negro, alone and on foot, came into camp and told them that many miles back a man lying by the road had begged a little water of him, and urged him to hurry on and bring assistance. The next morning a company of Mexicans came up, and brought word that the man was dying. But his old companions hesitated to go to his relief. The negro thereupon retraced his steps over the desert, and reached the sufferer just as he expired. He lifted him in his arms; the poor fellow strove to speak to his benefactor, and died in the effort. His mule, tied to a cactus, was already dead of hunger at his side. A picture commemorating such a scene, and the heroic humanity of the negro, would better adorn a panel of the Capitol, than any battle-piece which was ever painted. There is a graphic account of the author's first impressions of San Francisco. "A furious wind was blowing down through a gap in the hills, filling the streets with dust. On every side stood buildings of all kinds, began or half-finished, with canvas sheds open in front and covered with all kinds of signs, in all languages. Great piles of merchandise were in the open air, for lack of storehouses. The streets were full of people of as diverse and bizarre a character as their dwellings: Yankees of every possible variety, native Californians in serapes and sombreros, Chilians, Sonorians, Kanakas from Hawaii, Chinese with long tails, Malays armed with everlasting creeses, and others, in their bearded and embrowned visages, it was impossible to recognize any especial nationality." "San Francisco by day and night" is the title of one of the best chapters in the book.