A correction made in today's Los Angeles Times provides a primer on symphonic writing:

Verdi's "Requiem": An article in the Aug. 11 Arts & Books section about Verdi's "Requiem" said that the piece premiered in 1872. The first performance was in 1874. We also got a bit carried away with our Italian suffixes when illustrating a dynamic marking of quadruple fortissimo. Verdi's original marking, quadruple forte, was ffff, not ffffffff.