Jim Bridger, Mountain Man; a Biography
What is a greenhorn, and what did Jim Bridger become after he wasn't considered a greenhorn anymore from the biography, Jim Bridger, Mountain Man?
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When Jim Bridger was no longer considered a greenhorn (or a newcomer), he was then labeled as a hivernan or a "real" Mountain Man because he had wintered in the mountains.
Jim Bridger, Mountain Man