By what, or by whom, nobody knows, for the clerk and jailor coughed very loud, just at the right moment; and… — Charles Dickens

By what, or by whom, nobody knows, for the clerk and jailor coughed very loud, just at the right moment; and the former dropped a heavy book upon the floor, thus preventing the word from being heard--accidently, of course.

Source: Wikiquote · CC BY-SA 4.0