Well it was Thomas Jefferson who originally sent them on their journey to the coast, so I would imagine that he would have wanted to be kept updated on their progress and what they saw as they went about their journey.
Thomas Jefferson hired Lewis and Clark.
he wanted them to find information about the louisiana territory
sacagawea,lewis,clark,thomas jefferson
Jefferson
President Jefferson needed Lewis and Clark to map the Louisiana Territory and to explore it.
Thomas Jefferson
Lewis and Clark were sent by Thomas Jefferson to explore the west.
Thomas Jefferson expected Lewis and Clark to find Mammoths.
Lewis and Clark led the expedition.Meriwether Lewis and William Clark
Lewis and Clark kept journals so that they could report their discoveries to President Jefferson. At the time, Jefferson had just bout the Louisiana Territory and he needed to know what was over there. He chose Lewis, who was his personal secretary to go on an expedition and Lewis chose Clark to accompany him and be his second in command. They basically just needed to write down everything that would have been useful for president Jefferson.
Meriwether Lewis and William Clark, and Zebulon Pike
Jefferson