The chief domestic event of the time was the attack of the clerical party on Wycliffe and his followers.
It must have been at this time that an addition was made by Waynflete to the Eton college statutes, compelling the fellows to forswear the heresies of John Wycliffe and Pecock.
In ethics he anticipated much of the teaching of Tolstoy; in doctrine he often appealed to the authority of Wycliffe; and in some of his views it is possible to trace the influence of the Waldenses.
Among the important matters which claimed his attention at Constance may be mentioned also the condemnation of the errors of Wycliffe and the trial of John Huss.
A treatise entitled De ultima aetate ecclesiae, which appeared in 1356, has been attributed to Wycliffe, but is undoubtedly from the pen of an anonymous Joachimite Franciscan.