Turner Kirkland, Southern Derringers of the Mississippi Valley
“ Five guns exist that I do not have. They are A. J. Millspaugh, Shreveport, H. G. Newcomb, Natchez, J. A. Schaffer, Vicksburg, Louis Hoffman, Vicksburg and Holyoake-Lownes & Co. One other, F. Schumann is authenticated by newspaper accounts of that period as having made derringers but not a single specimen has ever turned up according to my collector friends. Of great importance though is a derringer barrel, octagon in shape, marked “F. Schumann, Memphis, Tennessee” that has never been assembled or made into a gun. ”
