Charles Preuss
George Karl Ludwig Preuss (1803–1854), anglicized as Charles Preuss, was a surveyor and cartographer who accompanied John C. Fremont on three of his five exploratory expeditions of the American west, including the expedition where he and Fremont were the first to record seeing Lake Tahoe from a mountaintop vantage point as they traversed what is now Carson Pass in February 1844. Preuss drew two important maps based on his records from Fremont's first two expeditions. Provided by Wikipedia-
Map of Oregon and upper California from the surveys of John Charles Fremont and other authoritiescartographic materialby Preuss, Charles, 1803-1854
Published 1848 -
Exploring with Frémontthe private diaries of Charles Preuss cartographer for John C Frémont on his first second and fourth expeditions to the Far WestBookby Preuss, Charles, 1803-1854
Published 1958 -
Topographical map of the road from Missouri to Oregon commencing at the mouth of the Kansas in the Missouri River and ending at the mouth of the Wallah Wallah in the Columbiain VII sectionscartographic materialby Preuss, Charles, 1803-1854
Published 1849 -
Topographical map of the road from Missouri to Oregoncommencing at the mouth of the Kansas in the Missouri River and ending at the mouth of the Wallah Wallah in the Columbia;cartographic material
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Map of Oregon and upper California from the surveys of John Charles Frémont and other authoritiescartographic materialby Frémont, John Charles, 1813-1890
Published 1848