These letters were found by Graham White in the archives of the Kew Gardens, in England. John Muir had traveled with Sir Joseph Hooker and Professor Asa Gray on a botanical expedition in 1877 through the Mount Shasta region, and thereafter remained life-long friends.
New Cache Of Muir Letters Discovered In England by Ron Limbaugh (explains source and origins of these letters)
Source: Kew Gardens archives, London, England; transcribed by Graham White
Acquired November 11, 1999