MapSketch of the two breakwaters above Alexandria in the Red River, Scale ca. 1:2000. LC Civil War Maps (2nd ed.), 241 "M. Section VIII.66." Detailed map showing upper and lower dams, falls, "Tennyson's channel," "De Russy's Channel," and some relief by hachures. Description ...
- Contributor: Gerdes, F. H. - De Russy, Lewis G.
- Date: 1864