President Jefferson accepted the estimate of $2500, and in his message of January 18, 1803, to Congress, he proposed the expedition. He urged that at this small expense a party of soldiers, well led, could in two summers map a trail clear to the western ocean; bring back valuable information upon climate, soil and peoples, and make Americans better acquainted with their own continent; also encourage the traders and trappers to use the Missouri River as a highway to and from the Indians, thus competing with the British of Canada. Congress voted to apply the $2500 on the proposed expedition. We may imagine how the tall, homely President Jefferson beamed――he, who so firmly believed in the expansion of American trade, and the onward march of the American flag. And we may imagine how young Captain Lewis glowed with joy, when now he might be definitely named as the leader to carry the flag. President Jefferson advised him to go at once to Philadelphia, and study botany, geology, astronomy, surveying, and all the other sciences and methods that would enable him to make a complete report upon the new country. At Lancaster, nearby, the celebrated Henry flint-lock rifles were manufactured, and he could attend to equipping his party with these high-grade guns, turned out according to his own directions. There should be two leaders, to provide against accident to one. Whom would he have, as comrade? He asked for his friend, William Clark, younger brother to the famed General George Rogers Clark, who in the Revolution had won the country west of the Alleghanies from the British and the Indians, afterward had saved the Ohio Valley from the angry redmen, and then had defied the Spaniards who would claim the Mississippi. As cadet only seventeen years old, and as stripling lieutenant appointed by Washington, William Clark himself had fought to keep this fertile region white. “A youth of solid and promising parts and as brave as Cæsar,” was said of him, in those terrible days when the Shawnees, the Mohawks and all declared: “No white man’s cabin shall smoke beyond the Ohio.” He, too, was a Virginian born, but raised in Kentucky. Now in this spring of 1803 he was verging on thirty-three years of age. He was russet-haired, gray-eyed, round-faced and large-framed――kindly, firm, and very honest. He had retired from the army, but by rank in the militia was entitled captain. For the purposes of the expedition President Jefferson commissioned him second lieutenant of artillery. Captain Clark was at the Clark family home of Mulberry Hill, three miles south of Louisville, Kentucky; Captain Lewis pursued his studies at Philadelphia. Meanwhile, what of Minister Livingston and the purchase from France of New Orleans――the mouth of the Mississippi?