Gray Herbarium Archives, Harvard University. Please contact this institution directly to obtain copies of the images or permission
to publish or use them beyond educational purposes.
The unpublished works of John Muir are copyrighted by the Muir-Hanna Trust. To purchase copies of images and/or obtain permission
to publish or exhibit them, see
http://library.pacific.edu/ha/forms )
Letter from John Muir to Asa Gray, 1882 Jan 2.