Among their other fine services provided to the public, the University of Nebraska-Lincoln hosts a free, one-webpage-per-day version of the collected diaries of

Among their other fine services provided to the public, the University of Nebraska-Lincoln hosts a free, one-webpage-per-day version of the collected diaries of Lewis and Clark, heavily cross-referenced. If you want to have some hint of how it was to be them, crossing unknown territory peopled by strangers, you could hardly do better. However, if you did manage to do better, it would probably be with Dale Morgan's Jedediah Smith and the Opening of the West, which was published by... the University of Nebraska Press.