Canadian prime minister John A. Macdonald and Hector Langevin (the former solicitor general and postmaster for Lower Canada) once attended a meeting at Montreal's McGill University during which Lord Dufferin, the governor general, delivered an address - entirely in Greek. The following day, a newspaper reported that Dufferin had spoken "the purest ancient Greek without mispronouncing a word or making the slightest solecism." "How would the reporter know that?" Langevin asked. "I told him," Macdonald declared. "But you don't know any Greek!" Langevin laughed. "That's true," Macdonald replied, "but I do know a little about politics."
Source: Clifton Fadiman, ed., Bartlett's Anecdotes