Abrams v. United States (1919)
This case, decided by the Supreme Court only eight months after its decision in Schenck, involved four political radicals who were arrested for distributing "seditious" leaflets by throwing them out of a third floor window in New York City.  By 7-2, the justices decided that the free speech rights of the accused had not been violated by their arrest.  The case is important for the eloquent dissent written by Justice Oliver Wendell Holmes, who modified his own "clear and present danger" test to say speech should be protected unless immediate danger to the government was at hand.  He called the leaflets involved in this case "silly" and said they did not represent such a danger and should therefore be protected.

http://www.oyez.org/cases/1901-1939/1919/1919_316/