Leonard Pennario was among the most popular American-born concert pianists of the 20th century. Pennario's professional career began at the tender age of 12 when he filled in for an ailing soloist on the Grieg Concerto in A minor at a 1936 concert with the Dallas Symphony Orchestra. Freshly inducted into the U.S. Army, Pennario gave his Carnegie Hall debut in the uniform of an Army private, playing the Liszt Piano Concerto No. 1 in November 1943. Pennario returned from his tour of duty to an eager reception in the concert world. At the time, a Minneapolis critic wrote "Pennari...