Jefferson showed his versatility in the instructions to Captain Lewis, which are a model of fulness and clearness. The route to be followed, natural products and possibilities—animal, vegetable, and mineral—climatic conditions, commercial routes, the soil and face of the country, were all dwelt on. The character, customs, disposition, territory occupied, tribal relations, means of subsistence, language, clothing, disease, moral attributes, laws, traditions, religion, intellectuality, extent and means of trade, war methods, with respect to the Indian tribes visited, were to be studied and reported. The topography of the country was to be accurately determined, astronomically and otherwise, and the maps and notes multiplied to avoid total loss. The good-will of the chiefs was to be sought, peaceful methods pursued, and the inflexible opposition of any extensive force promising bloodshed was to be met by withdrawal and retreat. The country then being outside the limits of the United States, passports from the ministers of Great Britain, Spain, and France were furnished.

Meriwether Lewis was born August 17, 1774, near Charlottesville, Va., being the son of John Lewis and Miss Meriwether, and grand-nephew of Fielding Lewis, who married a sister of George Washington. Volunteering, at the age of twenty, in the militia called out by Washington to put down the Shay rising, he was made ensign of the Second Sub-Legion May 1, 1795, and appointed in First Infantry November, 1796, where he rose to be paymaster and captain in 1800. He was a considerate and efficient officer, an expert hunter, versed in natural history, familiar with Indian character and customs. Appreciating his deficiencies in certain branches of science important in this expeditionary duty, he at once sought instruction from competent professors.

Jefferson describes Lewis as follows: “Of courage undaunted, possessing a firmness and perseverance of purpose which nothing but impossibilities could divert from its direction, ... honest, disinterested, liberal, of sound understanding and a fidelity to truth so scrupulous that whatever he should report would be as certain as seen ourselves.” The management and success of the expedition, it may here be said, fully justified the selection by and encomiums of Jefferson.

Lewis, given his choice of associate, selected William Clark, who was appointed by Jefferson second lieutenant of artillery. Clark was a brother of George Rogers Clark, by whose valor and sagacity the Illinois or Northwest Territory was secured to the United States, and this connection made his selection for further extension of the country seem most fitting. Moreover young Clark had qualifications and experiences which strongly commended him to Lewis. Born in Virginia, August 1, 1770, William Clark had a thorough knowledge of the privations and conditions of frontier life. Skilful as a hunter, a keen observer, familiar with military life from four years of service as a lieutenant of infantry, and developed from his ill health, which caused him to leave the army in 1796, into a magnificent specimen of manhood, he proved so efficient a coadjutor that his name will ever be inseparably associated with that of Lewis.

Lewis left Washington July 5, 1803, his mission being enhanced in its importance by the formal cession of Louisiana to the United States by the treaty of Paris, April 30, 1803, which news reached him July 1st. The rendezvous was at St. Louis, which was reached via Pittsburgh and the Ohio, recruits being selected at various posts, while Lieutenant Clark joined at Louisville, though he was not commissioned in the army till the following March.

When the party reached St. Louis, in December, 1803, formal notice of the transfer of Louisiana had not reached the Spanish commandant, who would not permit their passage westward. They passed the winter in camp opposite the mouth of the Missouri, where they built a barge with sail-power and two smaller boats, with which they started up the Missouri River on May 14, 1804.

The expedition, commanded by Captain Lewis, with Lieutenant Clark as second, comprised thirty-four selected men, eleven being watermen, a negro servant, and a hunter, who was also an interpreter.

The valley of the lower Missouri was well known to the French Canadians, who, pushed westward by the irruption of English settlers in the Illinois region, sought isolation and freedom from foreign restraint in the country west of the Mississippi. St. Louis was their headquarters, but the Missouri was their field of fortune. The village of St. Charles, with its single street, had about five hundred souls, who lived by hunting and trade with the Indians, agriculture being quite neglected; and an outpost of seven poverty-stricken families existed at La Charrette, the advance guard of civilization. But the typical French trader and trapper disdained the shelter of a roof and the restraint of communities. His adventurous spirit pushed his frail bark into the quiet waters of the upper Kansas, through the shallows of the Platte, under the overshading trees of the beautiful James, along the precipitous red-clay cliffs of the Big Sioux, and, in search of the beaver, even penetrated the winding narrows of the Cheyenne and Little Missouri. They did not even stop at transient visits, but, fascinated by the roving, aimless life of the savage, took up abode with him, shared his tepee and wanderings, adopted his customs, took his squaw to wife, until longings strange and uncontrollable drew them back in old age to the home and religion of their youth. One of these venturesome wanderers named Durion, who had lived twenty years among the Sioux, was picked up on the river and accompanied Lewis to the mouth of the James, as a much-needed interpreter.

The mouth of the Platte was passed on July 21st, and on the next day Lewis camped on the site of the present city of Council Bluffs, thus named by Lewis on account of his council with the Ottoes and Missouri Indians at this point. Here the first of a continuing series of presents was given to the grand chief: an American flag, a large medal, which was placed around his neck as a mark of consideration, paint, garters, cloth ornaments, a canister of powder, and the indispensable bottle of whiskey. The subordinate chiefs received inferior medals and presents according to their importance. These presents were made with much form and ceremony, wherein an important part were speeches setting forth the transfer of the territory to the United States, the benefits of peace, and the advantages of trade at the new post to be occupied by Americans.

Both Lewis and Clark had been accustomed to Indian life on the Eastern frontiers, but they found much that was strange and striking among the denizens of the great interior plains. Beyond the breech-cloth a loose buffalo robe usually kept the savage from nudity. The necklace of grizzly bear-claws, the ornaments of porcupine and feathers, the scalp-poles, the conical teepes covered with gayly-figured skins, the blue smoke up-curling from the open tent-top, the hoop-tambourine or half-drum, the queer whip-rattle of the hoofs of goats and deer, the bladder-rattle full of pebbles, the shaven heads of the men, the white-dressed buffalo robe with its jingling rows of porcupine quills and uncouth painted figures, emblematic of the brave’s war-history, the hawk-feather or eagle-plume head-dress worked with porcupine quills, the polecat skin trailing from the young brave’s moccasins, the deer-paunch tobacco-pouch, and a score of other novelties met their observing eyes. Among the Rickarees the octagonal earth-covered lodges, the picketed villages, the cultivated patches of corn, beans, and potatoes, the basket-like boats of interwoven boughs covered with a single buffalo skin, in which squaws paddled unconcernedly over high waves, were unknown phases of savage life.