Fig. 5. Thomas Nuttall; from The Popular Science Monthly, Vol. 46, 1895.

in the spring of 1811 the two made the journey up the river to the Mandan villages, as previously described in this paper. Both naturalists were more than once in extreme danger, but Nuttall brought back with him many treasures of seeds, plants and other objects of interest. The next eight years he remained at Philadelphia, studying in the winter the collections which he made during his summer excursions to various parts of the country east of the Mississippi, from the Great Lakes to Florida. At about this time he was preparing the manuscript