1911 Encyclopædia Britannica, Volume 6… (1911)
“ Clarksville lies in the centre of the dark tobacco belt—commonly known as the “Black Patch”—and is an important tobacco market, with an annual trade in that staple of about $4,000,000, most of the product being exported to France, Italy, Austria and Spain. The city is situated in a region well adapted for the growing of wheat, Indian corn, and vegetables, and for the raising of live-stock; and Clarksville is a shipping point for the lumber—chiefly oak, poplar and birch—and the iron-ore of the surrounding country, a branch of the Louisville & Nashville railway extending into the iron district. ”
