Paul Petau was a man of universal accomplishments. He was the rival of Scaliger in the science of chronology; his doctrinal works are praised as 'a monument of useful labour'; 'he solaced his leisure hours with Greek and Hebrew, as well as Latin verse,' and, according to Hallam's judgment, obtained in the last subject the general approbation of the critics. He formed a valuable museum of Greek, Roman, and Gaulish antiquities, with a cabinet of Frankish coins, to which Peiresc was a generous contributor. His library contained several books that had belonged to Grolier; but it was chiefly remarkable for its MSS., of which several were published by Sirmond and Du Chesne among other materials for the history of France. Many of them had been acquired from the collection of Greek and Hebrew books formed by Jean de Saint Andre, or out of the mass of chronicles, romances, and old French poems belonging to Claude Fauchet, and a large portion came, as we have seen, out of an ancient Benedictine Abbey. Paul Petau's books of all kinds were left to his son Alexander. The printed books, comprising a number of finely illustrated works on archaeology, were sold at the Hague in 1722; the sale included the old library inherited by Francis Mansard, and the MSS. relating to Roman antiquities that had been the property of Lipsius. A thousand splendid volumes on parchment, the pride of the elder Petau, described by all who saw them in terms of glowing admiration, were sold in his son's lifetime to Queen Christina of Sweden. She had always intended to buy some great collection, and had thought among others of buying up those of Henri de Mesmes, of De Bethune, and the Cardinal Mazarin. She was delighted with her new acquisition, and carried it off to Rome, where she made a triumphal entry with her books amidst the popular rejoicings.