Across the Wide Missouri, With an Account of the Discovery of the Miller Collection is a 1947 nonfiction history book by American historian Bernard DeVoto. It is the second volume of a trilogy that includes The Year of Decision (1942) and The Course of Empire (1952). It won the 1948 Pulitzer Prize for History.
Not who you're looking for? Others named Across the Wide Missouri: 1951 film by William A. Wellman