Washington Irving (April 3, 1783 - November 28, 1859) was an American short story writer, essayist, biographer, historian, and diplomat of the early 19th century. When Captain James Bonneville left for California in May of 1832 his motives were mixed. Officially, the French-born officer was on a two-year leave of absence from the U. S. Army, but he carried orders to collect information on the geography, geology, and topography "of the Country within the limits of the Territories belonging to the United States, between our frontier, and the Pacific." No one heard from him for five years, and he was assumed he was dead, or AWOL. But Bonneville had befriended a mountain man named Joseph Rutherford Walker in 1833, and the two men became the first white men to see Yosemite. They returned by a more southern route, discovering Walker Pass, the southern route across the Sierras (the salt flats in Utah are named in Bonneville's honor).