Philippe De Commynes (1447 - c. 1511) mentions Roussillon

Philippe de Commynes (1447 - c. 1511) mentions Roussillon which had been left as security by King John of Aragon, in return for the Frnech king's involvement in suprressing a civil war against John in the mid-15th century.
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The Memoirs of Philippe de Commynes, Lord of Argenton: Containing the

HISTORIES OF LOUIS XI AND CHARLES VIII, KINGS OF FRANCE;

and of

CHARLESTHE BOLD, DUKE OF BURGUNDY,

to which is added,

THE SCANDALOUS CHRONICLE,
or
SECRET HISTORY OF LOUIS Xl
BY JEAN DE TROYES.

Edited, with life and notes,

by ANDREW R. SCOBLE, Esq.

in two volumes

Volume II

London: Henry G. Bohn, York Street, Covent Garden.

1856.

https://books.google.es/books?hl=ca&id=FM3UAAAAMAAJ&dq=Aragon%2C+Navarre+%22de+Commynes%22&q=proof#v=onepage&q=Catalonia&f=false

Ch. IX. - How the King, behaved towards his Neighbours and Subjects during his Sickness; and how several Things were sent him from several Parts, for the Recovery of his Health. - 1483.

AFTER the consummation of this marriage*, which our King had so earnestly desired, the Flemings were perfectly at his command: Bretagne (which he hated so bitterly) was at peace with him, but he kept them in great awe and terror by the number of his forces, which he quartered upon their frontiers. Spain was quiet, and her king and queen desired nothing more than to live in peace and amity with him, for he kept them, likewise, in perpetual fear and expense about the country of Roussillon, which he held of the House of Arragon, and which had been given him by John King of Arragon, father to the present King of Castile, as security for some conditions** which have never yet been performed. The princes of Italy all courted his friendship; and some of them had entered into alliance with him, and sent ambassadors often to his coury. In Germany the Swiss were as obedient to him as his own subjects. The Kings of Seotland and Portugal were his allies. Part of Navarre was perfectly at his disposal. His subjects trembled before him; whatever he commanded was instantly executed, without the least difficulty or hesitation...

* Lady Margaret (aged 3), countess of Flanders and daughter of the Duke of Austria - Archduke Maximilian of Austria (later Holy Roman Emperor Maximilian I) and Mary, Duchess of Burgundy) and the Dauphin of France (aged 12) who was to become Charles VIII of France (30 June 1470 – 8 April 1498), were bethrothed at Metairie le Rayne, near Amboise, on June 22 1483, thus concluding the peace between the king and the Flemings. The betrothal was cancelled in 1491.

** By letters dated on the 23rd of May 1462, the ing of Arragon pledged the counties of Roussillon and Cerdagne to Louis XI for the sum of 300,000 golden crowns, on condition that Louis should supply him with a sufficient number of troops to reduce Catalonia, and to carry on the war in arragon and Valencia. These counties were restored to Castile by the Treaty of Barcelona, signed on the 19th of January 1493. - PRESCOTT'S Ferdinand and Isabella, vol.ii, p. 249.