Ten Years Later: The Man in The Iron Mask by Alexandre Dumas Chapter 31 Page 20

“Well!” replied he, addressing the governor, “I was right; these gentlemen are two Spanish captains with whom I was acquainted at Ypres, last year; they don’t know a word of French.”

“Ah!” said the governor, sharply. “And yet they were trying to read the inscription on the plate.”

D’Artagnan took it out of his hands, effacing the characters with the point of his sword.

“How!” cried the governor, “what are you doing? I cannot read them now!”

“It is a state secret,” replied D’Artagnan, bluntly; “and as you know that, according to the king’s orders, it is under the penalty of death any one should penetrate it, I will, if you like, allow you to read it, and have you shot immediately afterwards.”