_The Overland Trails._--Not to be outdone by the mariners of the deep, western scouts searched for overland routes to the Pacific. Zebulon Pike, explorer and pathfinder, by his expedition into the Southwest during Jefferson's administration, had discovered the resources of New Spain and had shown his countrymen how easy it was to reach Santa Fe from the upper waters of the Arkansas River. Not long afterward, traders laid open the route, making Franklin, Missouri, and later Fort Leavenworth the starting point. Along the trail, once surveyed, poured caravans heavily guarded by armed men against marauding Indians. Sand storms often wiped out all signs of the route; hunger and thirst did many a band of wagoners to death; but the lure of the game and the profits at the end kept the business thriving. Huge stocks of cottons, glass, hardware, and ammunition were drawn almost across the continent to be exchanged at Santa Fe for furs, Indian blankets, silver, and mules; and many a fortune was made out of the traffic. _Americans in California._--Why stop at Santa Fe? The question did not long remain unanswered. In 1829, Ewing Young broke the path to Los Angeles. Thirteen years later Fremont made the first of his celebrated expeditions across plain, desert, and mountain, arousing the interest of the entire country in the Far West. In the wake of the pathfinders went adventurers, settlers, and artisans. By 1847, more than one-fifth of the inhabitants in the little post of two thousand on San Francisco Bay were from the United States. The Mexican War, therefore, was not the beginning but the end of the American conquest of California--a conquest initiated by Americans who went to till the soil, to trade, or to follow some mechanical pursuit. _The Discovery of Gold._--As if to clinch the hold on California already secured by the friends of free soil, there came in 1848 the sudden discovery of gold at Sutter's Mill in the Sacramento Valley. When this exciting news reached the East, a mighty rush began to California, over the trails, across the Isthmus of Panama, and around Cape Horn. Before two years had passed, it is estimated that a hundred thousand people, in search of fortunes, had arrived in California--mechanics, teachers, doctors, lawyers, farmers, miners, and laborers from the four corners of the earth. [Illustration: _From an old print_ SAN FRANCISCO IN 1849]