In 1880 Brown, whose fortune was estimated conservatively at one million dollars, netted $98,000 from the Dade Coal Company. By 1886, Dade Coal was a parent company, owning Walker Iron and Coal, Rising Fawn Iron, Chattanooga Iron, and Rogers Railroad and Ore Banks, and leasing Castle Rock Coal Company. An 1889 reorganization resulted in the formation of the Georgia Mining, Manufacturing and Investment Company. This rested largely on a foundation of convict labor. The system has been likened by journalist Douglas A. Blackmon to "slavery by another name," in his book by that title.