Ten Years Later: The Man in The Iron Mask by Alexandre Dumas Chapter 28 Page 22

De Guiche contemplated for some time this unfortunate young man, half mad with despair, till there passed through his heart something like remorse at his own happiness. Raoul suppressed his feverish excitement, to assume the voice and countenance of an impassible man.

“They will make her, whose name I should wish still to be able to pronounce — they will make her suffer. Swear to me that you will not second them in anything — but that you will defend her when possible, as I would have done myself.”

“I swear I will,” replied De Guiche.

“And,” continued Raoul, “some day, when you shall have rendered her a great service — some day when she shall thank you, promise me to say these words to her — ’I