He usually wrote about political and historical issues but occasionally he wrote about other things such as music.
A May 3, 2004 article about him by David Remnick, the current editor of the New Yorker, contains the following:
In 1948, he went off to the Met's performance of "Rigoletto" and returned to the office to do a critical deed. "The question that came to mind was: How is it possible to make 'Rigoletto' sound dull, thick, interminable, sticky, and sick? Little boys playing airs from 'Rigoletto' on combs could gather crowds on a side street any day..... But leave 'Rigoletto' to the Metropolitan and the trick is miraculously done."