Relief shown by hachures. " ... it appears from a letter of J.H. Overton, United States Commissioner, dated Opelousas, Louisiana, August 10 1841 ... and the reply of October 1, 1841 ... that the maps ... had not been forwarded at that time. However, they had been received by January 15, 1842 ... and that they were issued by March 17, 1842, is shown ...
Phillips, 1384 Available also through the Library of Congress Web site as a raster image. LC copy in 3 parts. [See Sen. Doc. 199 2nd Session, 27th Congr. LC Vo. 397 for text and smaller maps] Mounted on cloth. For another copy and for neg. photostat, see Vault, Congress Collection, no. 104
Lee, Thomas Jefferson - Graham, J. D. (james Duncan) - United States. Army. Corps of Topographical Engineers