Mary Stuart by Alexandre Dumas

A week after the events we have related, as nine o'clock in the evening had just sounded from the castle bell, and the queen and Mary Seyton were sitting at a table where they were working at their tapestry, a stone thrown from the courtyard passed through the window bars, broke a pane of glass, and fell into the room. The queen's first idea was to believe it accidental or an insult; but Mary Seyton, turning round, noticed that the stone was wrapped up in a paper: she immediately picked it up. The paper was a letter from George Douglas, conceived in these terms: "You have commanded me to live, madam: I have obeyed, and your Majesty has been able to tell, from the Kinross light, that your servants continue to watch over you. However, not to raise suspicion, the soldiers collected for that fatal night dispersed at dawn, and will not gather again till a fresh attempt makes their presence necessary. But, alas! to renew this attempt now, when your Majesty's gaolers are on their guard, would be your ruin. Let them take every precaution, then, madam; let them sleep in security, while we, we, in our devotion, shall go on watching.

-"Patience and courage!" -"Brave and loyal heart!" cried Mary, "more constantly devoted to misfortune than others are to prosperity! Yes, I shall have patience and courage, and so long as that light shines I shall still believe in liberty."