This is the personal diary of American president Abraham Lincoln.
Lincoln's diary is found in the Museum of History Lower Halls. It is found in the large display room with the door that leads to the Museum of History Offices. The diary is lying on the first display on the right side of the room.
As a part of the unmarked quest Lincoln's Profit Margins, it can be sold to:
- Hannibal Hamlin from Temple of the Union (for 100 caps to start, but 200 upon passing a Speech check)
- Leroy Walker at the Lincoln Memorial (for 75 caps to start, but 200 upon passing a Speech check).
- Abraham Washington in Rivet City (for 100 caps, but 200 upon passing a Speech check)
Although it no longer serves any purpose, this item is still found in the game files for Fallout: New Vegas.