In the middle of September 1908, a sort [of] trampish looking fellow called on Doane Robinson, secretary of the South Dakota State Historical Society and head of the state\u27s Department of History. The visitor had just spent more than forty days on the Upper Missouri River, making his way in a small boat from Fort Benton, Montana, to Pierre, South Dakota. He had written Robinson a week earlier to warn him that he might not be looking his best. You will not expect me to appear in evening dress, he told Robinson. Yesterday I saw a mirror -- it made me laugh heartily. Robinson, about to turn fifty-two, was almost twice the age of his guest, the young Nebraska poet and short-story writer John G. Neihardt, then just twenty-seven and near...