Having understood Rustan's mode of procedure, Omobono had extracted from the sacristan such information as the latter possessed about Zoë and Kyría Agatha, but that was not very much after all. They had lived three or four weeks in the ruined house, or perhaps six; he could not remember exactly. At first they all came to the church, but they had sold their miserable clothes and their wretched belongings. The last time the girl had come, she had been alone, and she had worn a blanket over her shoulders to keep her warm. That had been at dusk. Then Rustan had bought her, and soon afterwards they must have gone away, since the beggars' physician was now installed in the house. Why should the sacristan take any interest in them? They were gone, and Constantinople was a vast city. No, the woman had not died, for he would have known it. When people died they were buried, even if they had starved to death in the beggars' quarter. Zoë thanked Omobono for the information, and begged him to continue her search. He wondered why she did not burst into tears, and concluded that she was either quite heartless, or was in love with Zeno, or both. He inclined to the latter theory. Love, he told himself with all the conviction of middle-aged inexperience, was a selfish passion. Zoë loved Zeno, and did not care what had become of her mother. Besides, he knew that she was jealous. She had heard of Giustina, and was determined to see her. She insisted that the boat should keep to the left, going up the Golden Horn, and she made the secretary point out Sebastian Polo's dwelling. It was a small palace, a hundred yards below the gardens of Blachernæ, and it had marble steps, like those at Zeno's house. A girl with dyed hair sat in the shade in an upper balcony; her hair was red auburn, like that of the Venetian women, and her face was white, but that was all Zoë could see. She wished she had a hawk's eyes. Omobono said it might be Giustina, but as the latter had many friends, it might also be one of them, for most Venetian women had hair of that colour. Farther up, they neared Blachernæ, and came first to the great Amena tower, of which the foundations stood on an escarped pier in the water. Zoë looked up, trying to guess the height of the upper windows from the water, but she had no experience, and they were very high--perhaps a hundred palms, perhaps fifty--Zeno would know. Could he get up there by a rope? She wondered, and she thought of what she should feel if she herself were hanging there in mid-air by a single rope against the smooth wall. Then in her imagination she saw Zeno half-way up, and some one cut the line above, for he was discovered, and he fell. A painful thrill ran down the back of her neck and her spine and through her limbs, and she shrank in her seat.