Here Erasistratus asked to have a description of the troubles which still affected Hermon's vision, and the passionate eagerness with which the leeches gazed into his eyes strengthened the artist's budding hope. Never had he wished more ardently that Daphne was back at his side. He also listened with keen attention when the scientists finally discussed in low tones what they had perceived, and caught the words, "White scar on the cornea," "leucoma," and "operation." He also heard Herophilus declare that an injury of the cornea by the flame of the torch was the cause of the blindness. In the work which led him to the discovery of the retina in the eye he had devoted himself sedulously to the organs of sight. This case seemed as if it had been created for his friend's keen knife. What expectations this assurance aroused in the half-cured man, who felt as if the goal was already gained, when, shortly after, Erasistratus, the greatest physician of his time, offered to make the attempt in Alexandria to remove, by a few little incisions, what still dimmed his impaired vision! Hermon, deeply agitated, thanked the leech, and when Thyone perceived what was passing in his mind she ventured to ask the question whether it would not be feasible to perform the beneficent work here, and, if possible, the next day, and the surgeon was ready to fulfil the wish of the matron and the sufferer speedily. He would bring the necessary instruments with him. It only depended upon whether a suitable room could be found in the crowded city, and Thyone believed that such a one could not be lacking in the great building at her disposal. A short conversation with the steward confirmed this opinion. Then Erasistratus appointed the next morning for the operation. During the ceremony of consecrating the temple it would be quiet in the house and its vicinity. The preliminary fasting which he imposed upon his patients Hermon had already undergone. "The pure desert air here," he added, "will be of the utmost assistance in recovery. The operation is slight, and free from danger. A few days will determine its success. I shall remain here with their Majesties, only--" and here he hesitated doubtfully--" where shall I find a competent assistant?" Herophilus looked his colleague in the face with a sly smile, saying, "If you credit the old man of Chalcedon with the needful skill, he is at your disposal." "Herophilus!" cried Thyone, and tears of emotion wet her aged eyes, which easily overflowed; but when Hermon tried to give expression to his fervent gratitude in words, Erasistratus interrupted him, exclaiming, as he grasped his comrade's hand, "It honours the general in his purple robe, when he uses the spade in the work of intrenchment." Many other matters were discussed before the professional friends withdrew, promising to go to work early the next morning.