
One time, when I was reading Strachey's Eminent Victorians, I laughed so loud that the warder came round to stop me, saying I must remember that prison was a place of punishment.
Source: The Autobiography of Bertrand Russell, v.2 chap. 1:The First War, 1968]
More info.:http://russell-j.com/beginner/AB21-270.HTM