in the Lake District of Northwestern Minnesota. He declared it to be the ultimate origin of the Mississippi River. For this discovery, he was made a Fellow of the Royal Geographical Society. This led to a series of newspaper articles and the book The Mississippi River and Its Wonderful Valley (1910).

Investigative journalism

Later in 1872, he returned to work and undertook a journalistic investigation of Bloomingdale Asylum, having himself committed with the help of some of

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