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John Muir
9
naturalist
9
writing
9
California
5
author
5
correspondence
5
correspondent
5
epistle
5
exchange of letters
5
letters
5
mail
5
message
5
missive
5
notes
5
post
5
Environmentalist
4
annotation
4
conservation
4
history
4
journal articles
4
national parks
4
pamphlets
4
speeches
4
travel
4
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