CONTENTS. 
INTRODUCTORY REMARKS. 
CHAPTER I. 
Explorations from A. D. 1800 to A. D. 1832 
Captains Lewis and Clarke, U. 8, A., 1804-'5-' 6.—Major Pike, U. S. A., 1805-'6.—Humboldt's New Spain, 1811.—Rector, C. 
E., and Roberdeau, T. E., map, 1818.—Major Long, T. E., first expedition, 1819-'20.— Major Long, T. E., second expe- 
dition, 1823.—J. C. Brown, C. E., survey, 1825-'26—'27,—R. Richardson, C. E., survey, 1826.—Northwestern boundary 
Commission, 1828.—-British Admiralty charts, 1828.—Lieut. Hardy, R. N., exploration of Gulf of California, 1825-'26— 
'27-—28.—Ross Cox's adventures on the Columbia, 1832.— Lieut. Allen, U. S. A., reconnaissance of source of the 
Mississippi, 1832.—Schoolcraft’s narrative, 1832.—Finley's map of North America, 1826. 
CHAPTER II. 
Explorations from A. D. 1832 to A. D. 1844. 
Capt. Bonneville, U. S. A., expedition, 1832 to 1836.— Discovery of Great Salt lake and Humboldt river.—Irving’s Astoria.— 
Lieut, E. Steen, U. S. A., map, 1835.— Topographical Bureau, map of western frontier, 1837.—C. Dimmock, C. E., sur- _ 
vey, 1838.—Capt. W. Hood, T. E., memoir and map, 1839.—Topographical Bureau, map of Oregon, 1838.—Survey of 
boundary of Louisiana and Texas, 1840.—Com. Wilkes, U. S. N., map of Oregon, 1841.—Kendall’s Santa Fé expedition, 
1841.— Prof. Nicollet's exploration and map, 1836 to 1840. —Lieut. J. C. Frémont, T. E., exploration, 1842.— Capt. ۰ 
Boone, U. S. A., expedition, 1843.— Capt. J. Allen, U. S. A., expedition, 1843.—Topographical Bureau, map of Texas, 
1844,—Gregg’s '*'Commerce of the Prairies," 1844. 
foie a Aiii ee TU 
OS ee ey ee 
| CHAPTER III. 
Explorations from A. D. 1843 to A. D. 1852. 
Capt. J. C. Frémont, T. e exploration, 1843-'44.—Uapt. J. C. Frémont, pem in 1845-'46.—Lieut. J. W. Abert, T. 
E., reconnaissance, 1845.—Lieut. W. B. Franklin, T. E., reconnaissance, 1845.—Brevet Maj. W. H. Emory, T. E., recon- 
iem, 1846-'47.—Lieut. J. W. Abert, T. E., reconnaissance, Iu. Ee Col. P. St. George Cooke, U.S. A., 
expedition, 1846-147. —A. Wislizenus, M. D., examination, 1846-'47.— Brevet Capt. W. H. Warner, T. E., reconnaissance, 
1847—'48-'49.—Lieut.G. H. Derby, T. E., reconnaissance, 1849. —Lieut. J. D. Webster, T. E., survey of mouth Rio Grande, 
1847.—Lieut. J. H, Simpson, T. E., reconnaissance along the Canadian river, 1849.—Lieut. J. H. Simpson, T. E., recon» 
naissance, Navajo country, 1849.— Capt. R. B. Marcy, U. S. A., expedition, 1849.—Capt. H. Stansbury, T. E., expedition 
to Great Salt lake, 1849—'50.—March of rifle regiment to Oregon, 1849.-—Major Wood, U. S. Inf., and Capt. Pope, T. E., 
expedition to Red river, 1849.— Brevet Lieut. Col. Johnston, T. E., reconnaissances in Texas, 1849, 1850-'51.— Topograph- 
ical Bureau, map of territory of United States west of the Mississippi, 1850.—R. H. Kern, C. E., reconnaissance on the 
Pecos river, 1850.—Lieut. J. G. Parke, T. E., map of New Mexico, 1851.— Capt. Sitgreaves and Lieut. Woodruff, T. E., 
of Creek country, 1850-'51.—Capt. Sitgreaves, T. E., expedition to Zuñi and Colorado rivers, 1851.—Lieut. G. 
H. Derby, T. E., reconnaissance, mouth of Colorado river, 1851.—Lieut, I. C. Woodruff, T. E., reconnaissance, 1852.— | 
Capt. R. B. Marcy, U. S. A., expedition to source of Red river. 
