very state and territory of the Far West. The mineral empireThere were few truly rich "strikes" in the post-Civil War years. Of those few, the most important were the fabulously rich Comstock Lode of silver in western Nevada (first discovered in 1859 but developed more extensively later) and the discovery of gold in the Black Hills of South Dakota (1874) and at Cripple Creek, Colo. (1891). Each new discovery of gold or silver produced an instant mining town to supply the needs and pleasures of the prospectors. If most of the ore was close to the surface, the prospectors would soon extract it and depart, leaving behind a ghost town--empty of people but a reminder of a romantic moment in the past. If the veins ran deep, organized groups with the capital to buy the needed machinery would move in to mine the subsoil wealth, and the mining town would gain some stability as the centre of a local industry. In a few instances, those towns gained permanent status as the commercial centres of agricultural areas that first developed to meet the needs of the miners but later expanded to produce a surplus that they exported to other parts of the West.The open rangeAt the close of the Civil War, the price of beef in the Northern states was abnormally high. At the same time, millions of cattle grazed aimlessly on the plains of Texas. A few shrewd Texans concluded that there might be greater profits in cattle than in cotton, especially because it required little capital to enter the cattle business--only enough to employ a few cowboys to tend the cattle during the year and to drive them to market in the spring. No one owned the cattle, and they grazed without charge upon the public domain. (See Open Range.) The one serious problem was the shipment of the cattle to market. The Kansas Pacific resolved that problem when it completed a rail line that ran as far west as Abilene, Kan., in 1867. Abilene was 200 miles (300 kilometres) from the nearest point in...