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John Muir
12
naturalist
12
writing
California
8
author
8
correspondence
8
correspondent
8
epistle
8
exchange of letters
8
letters
8
mail
8
message
8
missive
8
notes
8
post
8
Environmentalist
4
annotation
4
conservation
4
history
4
journal articles
4
national parks
4
pamphlets
4
speeches
4
travel
4
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