The Final Adventure of a Pioneer Scientist
By Sharon Levy
The obsessive navigator Josiah Gregg alienated the members of an ill-fated expedition into California’s wilderness.
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Josiah Gregg was an obsessive 19th-century math savant, navigator, medical doctor and botanist — and a terrible traveling companion, according to the members of a harrowing expedition he led into the California wilderness. He possessed remarkable talents, but relating to his fellow humans was not one of them. (Visual: )
