Lewis and Clark took medicine in their journey. What they did to avoid malaria is they took mercury pills, which was actually one of the very common treatment treatments. Some people believed it was a sign from God himself that the war was over. It wasn't until information became more public that my grandfather found out what it was that he saw. He had a good life afterward, joining the US Army for the Korean War,. Later establishing most of the AT&T telephone lines in small towns across New Mexico.