_Tirant lo Blanch_ indicates that its author was intimately acquainted with the English romance. Is it not probable that Guy of Warwick’s activities at Constantinople reminded Martorell of Roger de Flor’s heroic services to the emperor of that same city, whereupon he selected that historical event as a background for a certain part of the career of his hero? It must be remembered that Martorell knew well the exploits of the brave and adventurous soldiers of the Catalan-Aragonese expedition. His conception of military heroism was in great part based on the history, traditional or written, of his people. The spirit that animated its heroes became a part of him, and consequently it was but natural that that spirit should find expression in a literary production in which a military hero is portrayed. From the above comparative study of _Tirant lo Blanch_ in relation to its sources, viz., Lull’s _Libre del Orde d’Cauayleria_, Muntaner’s _Chronica_, and the English romance, _Guy of Warwick_, we are convinced that these sources have furnished important ideas and material to Martorell. The features drawn from Lull’s work are few, but, on the other hand, they have been subjected to very little change. It is important, however, for it seems to have provided a starting point for the author. Guy of Warwick has yielded more concrete material than the other two sources, but it has been modified to suit the pleasure and to meet the needs of the author. Muntaner’s _Chronica_ did not furnish as many ideas and suggestions as _Guy of Warwick_, but the martial spirit of the Catalan and Aragonese warriors pervades a large part of the work.