قصة الكتاب :
Early trans-Mississippi exploration was undertaken largely in the interests of science. The great expedition of Lewis and Clark (1804-06) was, both in conception and plan, a scientific excursion. Bradbury and Brackenridge voyaged up the Missouri (1811) in search of rare plants and animals, Nuttall sought the Arkansas (1819) on a similar errand. Long\'s expedition (1819-20) was entirely scientific, both in organization and objects; while Townsend crossed the continent with Nathaniel Wyeth (1834) to secure a harvest of rare birds in the mountains and beyond. In the early nineteenth century, scientific collection was the chief object of ambition among thoughtful explorers—to secure for the world a complete catalogue of its plants and animals was worth much toil and hardship, heroic endeavor, and mighty daring. To such, the still unknown regions of the New World offered strong attractions. There were in the trans-Mississippi and in South America, spread out upon mountains and prairies and bordering far-flowing streams, fresh races of barbarians yet uncontaminated by civilized contact, beasts of prey, birds of brilliant plumage, and unknown plant species.\r\n