This collection houses personal and professional correspondence documenting Campbell Wallace's involvement with insurance and property, requests for financial aid, references, verification of character, financial backing, railroads, private businesses, and stock companies. The bulk of the letters discuss Wallace's work as the President of the State National Bank (Atlanta, Georgia), President of the Merchant's Bank (Atlanta, Georgia), Superintendent of the East Tennessee and Georgia Railroad, Chairman of the Georgia Railroad Commission, President of the Georgia Western Railroad, President of the Georgia Railroad and Banking Company, Superintendent of the Western and Atlantic Railroad, and Stockholder in the Elyton Land Company, the East Tennessee Iron and Coal Company, and the New River Mining Company.

With the exception of receipts and cancelled checks, all of the materials have been filed chronologically. The bulk of the papers date from 1840 to 1895. The later correspondence was likely addressed to Wallace's son (Charles B. Wallace Sr.) and grandson (Campbell Wallace). All undated materials whose dates can reasonably be inferred have been housed at the front of the folder for the corresponding year.