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John Muir
naturalist
3
Environmentalist
2
conservation
2
correspondence
2
history
2
letters
2
national parks
2
travel
2
writing
2
California
1
annotation
1
author
1
correspondent
1
epistle
1
exchange of letters
1
journal articles
1
mail
1
message
1
missive
1
notes
1
pamphlets
1
post
1
speeches
1
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