A Scottish immigrant to Illinois, Joseph Brown made his pre-Civil War fortune as a miller and steamboat captain who dabbled in riverboat design and the politics of small towns. When war erupted, he used his connections (including a friendship with Abraham Lincoln) to obtain contracts to build three ironclad gunboats for the U.S. War Department--the Chillicothe, Indianola and Tuscumbia. Often described as failures, these vessels were...