"On October 1, 1838, the first detachment set out in what was to be known as the Trail of Tears. As they moved westward, they began to die--of sickness, of drought, of the heat, of exposure. There were 645 wagons, and people marching alongside. Survivors, years later, told of halting at the edge of the Mississippi in the middle of winter, the river running full of ice, "hundreds of sick and dying penned up in wagons or stretched upon the ground." Grant Foreman, the leading authority on Indian removal, estimates that during confinement in the stockade or on the march westward four thousand Cherokees died. In December 1838, President Van Buren spoke to Congress: It affords sincere pleasure to apprise the Congress of the entire removal of the Cherokee Nation of Indians to their new homes west of the Mississippi. The measures authorized by Congress at its last session have had the happiest effects."