[MISSISSIPPI RIVER COMMISSION]. Preliminary map of the lower Mississippi River: from the mouth of the Ohio River to the head of the passes. [Washington, D. C.]: Mississippi River Commission, 1881-1885. Oblong folio (370 x 595 mm). 32 lithographed mapsheets. (Some browning or mostly marginal chipping with occasional losses.) Original half green roan, black morocco lettering-piece gilt to upper cover (wear to spine and corners.) The Mississippi River Commission was founded in 1879 to facilitate improvement of the Mississippi River from the Head of Passes to its headwaters. Not in Rumsey.