Landry of Paris dating history

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We have seen and known that a man which men call Raoul Gracard was smitten suddenly, and had the head much great and swollen, and was so red in the face of him that all folk that saw him deemed and held him for a leper. Which man with great haste came to the presence of Saint Landry, and there he confessed him much devoutly, receiving much benignly his penance, and after he came to the sudary of the saint and with great devotion kissed it, and when he had done his offering and vow with much great faith and hope he returned, and unnethe [hardly] he was come to his house when he became as whole as ever he was. Be therefore the name of God praised, who for his good friend Saint Landry he healed so promptly the foresaid patient.