At the second general chapter (May, 1219) Francis, bent on realizing his project of evangelizing the infidels, assigned a separate mission to each of his foremost disciples, himself selecting the seat of war between the crusaders and the Saracens. With eleven companions, including Brother Illuminato and Peter of Cattaneo, Francis set sail from Ancona on 21 June, for Saint-Jean d'Acre, and he was present at the siege and taking of Damietta. After preaching there to the assembled Christian forces, Francis fearlessly passed over to the infidel camp, where he was taken prisoner and led before the sultan. According to the testimony of Jacques de Vitry, who was with the crusaders at Damietta, the sultan received Francis with courtesy, but beyond obtaining a promise from this ruler of more indulgent treatment for the Christian captives, the saint's preaching seems to have effected little. Before returning to Europe, the saint is believed to have visited Palestine and there obtained for the friars the foothold they still retain as guardians of the holy places. What is certain is that Francis was compelled to hasten back to Italy because of various troubles that had arisen there during his absence. News had reached him in the East that Matthew of Narni and Gregory of Naples, the two vicars-general whom he had left in charge of the order, had summoned a chapter which, among other innovations, sought to impose new fasts upon the friars, more severe than the rule required. Moreover, Cardinal Ugolino had conferred on the Poor Ladies a written rule which was practically that of the Benedictine nuns, and Brother Philip, whom Francis had charged with their interests, had accepted it. To make matters worse, John of Capella, one of the saint's first companions, had assembled a large number of lepers, both men and women, with a view to forming them into a new religious order, and had set out for Rome to seek approval for the rule he had drawn up for these unfortunates. Finally a rumour had been spread abroad that Francis was dead, so that when the saint returned to Italy with brother Elias -- he appeared to have arrived at Venice in July, 1220 -- a general feeling of unrest prevailed among the friars. Apart from these difficulties, the order was then passing through a period of transition. It had become evident that the simple, familiar, and unceremonious ways which had marked the Franciscan movement at its beginning were gradually disappearing, and that the heroic poverty practiced by Francis and his companions at the outset became less easy as the friars with amazing rapidity increased in number. And this Francis could not help seeing on his return. Cardinal Ugolino had already undertaken the task "of reconciling inspirations so unstudied and so free with an order of things they had outgrown." This remarkable man, who afterwards ascended the papal throne as Gregory IX, was deeply attached to Francis, whom he venerated as a saint and also, some writers tell us, managed as an enthusiast. That Cardinal Ugolino had no small share in bringing Francis's lofty ideals "within range and compass" seems beyond dispute, and it is not difficult to recognize his hand in the important changes made in the organization of the order in the so-called Chapter of Mats. At this famous assembly, held at Porziuncola at Whitsuntide, 1220 or 1221 (there is seemingly much room for doubt as to the exact date and number of the early chapters), about 5000 friars are said to have been present, besides some 500 applicants for admission to the order. Huts of wattle and mud afforded shelter for this multitude. Francis had purposely made no provision for them, but the charity of the neighbouring towns supplied them with food, while knights and nobles waited upon them gladly. It was on this occasion that Francis, harassed no doubt and disheartened at the tendency betrayed by a large number of the friars to relax the rigours of the rule, according to the promptings of human prudence, and feeling, perhaps unfitted for a place which now called largely for organizing abilities, relinquished his position as general of the order in favour of Peter of Cattaneo. But the latter died in less than a year, being succeeded as vicar-general by the unhappy Brother Elias, who continued in that office until the death of Francis. The saint, meanwhile, during the few years that remained in him, sought to impress on the friars by the silent teaching of personal example of what sort he would fain have them to be. Already, while passing through Bologna on his return from the East, Francis had refused to enter the convent there because he had heard it called the "House of the Friars" and because a <studium> had been instituted there. He moreover bade all the friars, even those who were ill, quit it at once, and it was only some time after, when Cardinal Ugolino had publicly declared the house to be his own property, that Francis suffered his brethren to re-enter it. Yet strong and definite as the saint's convictions were, and determinedly as his line was taken, he was never a slave to a theory in regard to the observances of poverty or anything else; about him indeed, there was nothing narrow or fanatical. As for his attitude towards study, Francis desiderated for his friars only such theological knowledge as was conformable to the mission of the order, which was before all else a mission of example. Hence he regarded the accumulation of books as being at variance with the poverty his friars professed, and he resisted the eager desire for mere book-learning, so prevalent in his time, in so far as it struck at the roots of that simplicity which entered so largely into the essence of his life and ideal and threatened to stifle the spirit of prayer, which he accounted preferable to all the rest.