12. The defections, from whatever cause, are numerous in the seventeenth century. But two, more eminent than any who actually renounced the Protestant religion, must be owned to have given evident signs of wavering, Casaubon and Grotius. The proofs of this are not founded merely on anecdotes which might be disputed, but on their own language.[66] Casaubon was staggered by the study of the fathers, in which he discovered many things, especially as to the eucharist, which he could not in any manner reconcile with tenets of the French Hugonots.[67] Perron used to assail him with arguments he could not parry. If we may believe this cardinal, he was on the point of declaring publicly his conversion before he accepted the invitation of James I. to England; and even while in England he promoted the Catholic cause more than the world was aware.[68] This is more than we can readily believe, and we know that he was engaged both in maintaining the temporal rights of the crown against the school of Bellarmin, and in writing animadversions on the ecclesiastical annals of Baronius. But this opposition to the extreme line of the ultra-montanists might be well compatible with a tendency towards much that the reformers had denounced. It seemed in truth to disguise the corruptions of the Catholic church by rendering the controversy almost what we might call personal; as if Rome alone, either by usurping the headship of the church, which might or might not have bad consequences, or by its encroachments on the civil power which were only maintained by a party, were the sole object of that religious opposition, which had divided one half of Europe from the other. Yet if Casaubon, as he had much inclination to do, being on ill terms with some in England, and disliking the country,[69] had returned to France, it seems probable that he would not long have continued in what, according to the principles he had adopted, would appear a schismatical communion.