The following events occurred in the 1810s:
- Weeks after Lewis' death, Major Gilbert Russel writes a letter to Jefferson about Lewis' visit to Fort Pickering the day before he dies.
- General James Wilkinson forges a Major Gilbert Russel letter to Jefferson about Lewis' suicidal tendencies the day before he dies.
- Publication of the official and definitive account of Lewis and Clark expedition.
- Angus MacDowell writes in his diary about the Native American potlatch tradition.
- Poison Ivy Epidemic in Twin Peaks.