This sounds like an interesting exhibit, at the Concord Museum in Massachusetts:
This Ever New Self: Thoreau and His Journal. 
“The show centers on the journal Thoreau kept throughout his life and its importance in understanding the essential Thoreau. More than twenty of Thoreau’s journal notebooks are shown along with letters and manuscripts, books from his library, pressed plants from his herbarium, and important personal artifacts like his walking stick.”
The exhibition runs through Jan. 21, 2018.
More info at: The Concord Museum
This sounds fascinating, I’m a bit jealous that I’m in the wrong country!