An early 20th century Broadway composer/lyricist, producer, playwright, and epitomic song-and-dance man with a long history on the vaudeville stage, George M. Cohan is best-remembered for rousing standards like "Give My Regards to Broadway," "The Yankee Doodle Boy," and the World War I anthem "Over There." The former two songs both originally appeared in his 1904 Broadway musical Little Johnny Jones, in which the composer also starred. Two years later, another enduring standard, "You're a Grand Old Flag," debuted in his stage musical George Washington, Jr. Published in 1917 at...