I have recently uncovered some interesting historical documents for the area surrounding Twain’s Vineyard and thought it would be interesting to share. See below for a 1906 USGS Topographical Map of the Missouri (Washington County) Potosi Quadrangle:
Here is a link to a PDF file containing Henry R. Schoolcraft’s, Journal of a Tour into the Interior of Missouri and Arkansaw, from Potosi, or Mine a Burton, in Missouri Territory, in a South-West Direction, toward the Rocky Mountains, Performed in the Years 1818 and 1819. London: Richard Phillips and Company, 1821 [Complete Version. Original spelling has been retained.]