The main facts of the legend are followed closely in this fresco, but St. Bonaventure does not tell us how the miracle was performed, while Giotto, understanding the soul of Francis, paints him kneeling outside the gates of Arezzo praying with intense fervour for the salvation of the city. His faith is so strong that he does not even look up like Brother Sylvester, to see the demons flee away; some springing from off the chimneys, others circling above the towers, their bat-like wings outspread. The figure of Brother Sylvester is very fine, and the way he is lifting his tunic and stepping forward, as he stretches out one arm with a gesture of command towards the demons, could not be rendered with more ease and truth.
11. _St. Francis and Brother Illuminatus before the Sultan of Egypt._
"When they had gone a little further, they met with a band of Saracens, who, quickly falling upon them, like wolves upon a flock of sheep, cruelly seized and bound the servants of God ... having in many ways afflicted and oppressed them, they were ... according to the holy man's desire, brought into the presence of the Sultan. And being questioned by that prince whence and for what purpose they had come ... the servant of Christ, being enlightened from on high, answered him thus: 'If thou and thy people will be converted to Christ I will willingly abide with thee. But if thou art doubtful whether or not to forsake the law of Mohamed for the faith of Christ, command a great fire to be lighted, and I will go into it with thy priests, that it may be known which faith should be held to be the most certain and the most holy.' To whom the Sultan made answer: 'I do not believe that any of my priests would be willing to expose himself to the fire or to endure any manner of torment in defence of his faith.' Then said the holy man: 'If thou wilt promise me for thyself and thy people that thou wilt embrace the worship of Christ if I come forth unharmed, I will enter the fire alone.' ... But the Sultan answered that he dared not accept this challenge, because he feared a sedition of the people."
This subject, from its dramatic interest, appealed to Giotto, giving full scope to his powers, both as a story-teller, and as a painter with such genius for portraying dignity and nobility of character. The principal persons, the Sultan and St. Francis, are here clearly placed before us as Giotto wished us to conceive them, and how correctly he realised their characters we learn from the chronicles of the time. "We saw," writes Jacques de Vitry in one of his letters, "Brother Francis arrive, who is the founder of the Minorite Order; he was a simple man, without letters, but very lovable and dear to God as well as to men. He came while the army of the Crusaders was under Damietta, and was much respected by all." This is indeed the man depicted by Giotto in the slight figure of the preacher standing at the foot of the marble throne, so humble, yet full of that secret power which won even the Sultan's admiration. But though the story centres in St. Francis, the person Giotto wishes all to notice is the Sultan, who, far from being an ignorant heathen to be converted, conveys the idea of a most noble and kingly person, Malek Camel in short, known throughout the East as the "Perfect Prince." His mollahs had wished to kill St. Francis and his companion, and the fine answer he made was worthy of his high character. "Seigneurs," he said, addressing his visitors, "they have commanded me by Mahomet and by the law to have your heads cut off. For thus the law commands; but I will go against the order, or else I should render you bad guerdon for having risked death to save my soul."