One irreparable loss was inflicted upon Greece by this expedition. In order to prevent the castle of St Omer at Thebes from falling into his hands, the Catalans destroyed that noble monument of Frankish rule. Loudly does the _Chronicle of the Morea_ lament over the loss of a building more closely associated than any other with the past glories of the De la Roche. At the time of its destruction it belonged to Bartolommeo Ghisi, Great Constable of Achaia, one of the three great barons of Eubœa, son-in-law of Fadrique, and a man of literary and historic tastes, for the French version of the Chronicle, _Le Livre de la Conqueste_, was originally found in his Theban castle[92]. Had Fadrique still been head of the Company at the time, he would probably have saved his kinsman’s home; but for some unexplained reason he was no longer vicar-general, though he was still in Greece. Possibly, as he paid a visit to Sicily about this time, he may have been accused at the Sicilian Court of aiming at independent sovereignty in the duchies—an accusation to which his too successful career may have lent some colour. Though he never resumed the leadership of the Catalans he passed the rest of his life in Greece, where one of his sons was Count of Salona, and another became, later on, vicar-general of the duchies. Soon after Walter’s futile expedition the Papacy made its peace with the “sons of perdition,” who came to be regarded as a possible defence against the growing Turkish peril. Unfortunately, when the Catalans became respectable members of Christendom, they ceased to be formidable. Occasionally the old Adam broke out, as when the Count of Salona plied the trade of a pirate with the aid of the “unspeakable” Turk. But their Thessalian conquests were slipping away from the luxurious and drunken progeny of the hardy warriors who had smitten the Franks in the marshes of the Kephissos. Meanwhile, in distant Sicily, the shadowy Dukes of Athens and Neopatras came and went without ever seeing their Greek duchies. Duke William died in 1338; and his successors, John and Frederick of Randazzo, the picturesque town on the slopes of Etna, both succumbed to the plague a few years later—mere names in the history of Athens. But in 1355 the new Duke of Athens became also King of Sicily, under the title of Frederick III; and thus the two duchies, which had hitherto been the appanage of younger members of the royal family, were united with the Sicilian crown in the person of its holder.