The Last of the Barons, Book IX by Edward Bulwer-lytton

In truth, the young prince, in obedience to a secret message from the artful Louis, had repaired to the court of Amboise under the name of the Count de F -- . The French king had long before made himself acquainted with Prince Edward's romantic attachment to the earl's daughter, through the agent employed by Edward to transmit his portrait to Anne at Rouen; and from him, probably, came to Oxford the suggestion which that nobleman had hazarded to Montagu; and now that it became his policy seriously and earnestly to espouse the cause of his kinswoman Margaret, he saw all the advantage to his cold statecraft which could be drawn from a boyish love. Louis had a well- founded fear of the warlike spirit and military talents of Edward IV.

; and this fear had induced him hitherto to refrain from openly espousing the cause of the Lancastrians, though it did not prevent his abetting such seditions and intrigues as could confine the attention of the martial Plantagenet to the perils of his own realm. But now that the breach between Warwick and the king had taken place; now that the earl could no longer curb the desire of the Yorkist monarch to advance his hereditary claims to the fairest provinces of France, -- nay, peradventure, to France itself, -- while the defection of Lord Warwick gave to the Lancastrians the first fair hope of success in urging their own pretensions to the English throne, he bent all the powers of his intellect and his will towards the restoration of a natural ally and the downfall of a dangerous foe.