Walt Whitman burst onto the literary stage raring for a fight with his transatlantic forebears. With the unmetered and unrhymed long lines of Leaves of Grass, he blithely forsook "the old models" declaring that "poems distilled from other poems will probably pass away." In a self-authored but unsigned review of the inaugural 1855 edition, Whitman boasted that its influence-free author "makes no allusions to books or writers; their spirits do not seem...