Most of the maps we see that Clark made during the trip to the Pacific and back were only sketches. Clark would to use those sketches, along with his survey notes, later to make his final maps. His map that was completed in the years following the Expedition was amazingly accurate and complete.
Consequently, we can’t read most of his maps drawn in the field and take them literally. Those maps are like much of the writing in the journals. Before they can be used as “the authority” they must be reviewed and used along with Clark’s survey notes and distances to understand them.
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