What did they send back to st Louis and eventually the president in the Lewis and Clark expedition?

During the Lewis and Clark Expedition, the explorers sent back various specimens and artifacts to St. Louis, including plant and animal samples, maps, and detailed journals documenting their findings. Notably, they sent back a specimen of the prairie dog and other unique items that showcased the diverse wildlife and geography of the newly explored territories. These materials ultimately reached President Thomas Jefferson, who was keenly interested in the scientific and geographical information gathered during the expedition. This correspondence contributed significantly to the understanding of the American West.