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.
It was up there, in the highest story, that Johannes had been a prisoner nearly two years. The windows needed no gratings, for it would be death to leap out, and no one could climb up to get in. The pier below the tower sloped to the stream, and its base ran out so far that no man could have jumped clear of it from above—even if he dared the desperate risk of striking the water. Bertrandon de la Broquière saw it, years afterwards, when Zeno was an old man, and you may look at a good picture of it in his illuminated book.
A solitary fisherman was perched on the edge of the sloping pier, apparently hindered from slipping off by the very slight projection of the lowest course of stones, which was perpendicular. His brown legs were bare far above the knee, he wore a brown fisherman's coat of a woollen stuff, not woven but fulled like felt; a wide hat of sennet, sewn round and round a small crown of tarred sailcloth, flapped over his ears. He angled in the slow stream with a long reed and a short line.
Zoë looked at him attentively as the boat passed near him, and she saw that he was watching her, too, from under the limp brim of his queer hat.
Her left hand hung over the gunwale of the skiff, and when she was opposite the fisherman she wetted her fingers and carelessly raised them to her lips as if she were tasting the drops. The man instantly replied by waving his rod over the water thrice, and he cast his short line each time. She had seen his mouth and chin and scanty beard below the hanging brim of his hat, and she had fancied that she recognised him; she had no doubt of it now. The solitary fisherman was Gorlias Pietrogliant, the astrologer.
Omobono had scarcely noticed him, for his own natural curiosity made him look steadily up at the high windows, on the chance that the imperial prisoner might look out just then. He had seen him once or twice before the revolution, and wondered whether he was much changed by his long confinement. But instead of the handsome bearded face the secretary remembered, a woman appeared and looked towards Pera for a moment, and drew back hastily as she caught sight of the skiff; she was rather a stout woman with red cheeks, and she wore the Greek head-dress of the upper classes. So much Omobono saw at a glance, though the window was fully ninety feet above him, and she had only remained in sight a few seconds. He had always had good eyes.
But without seeing her at all Zoë had understood that communication between the prisoner and the outer world was carried on through Gorlias, and that by him a message could be sent directly to the Emperor. She did not speak till the boat had passed the whole length of the palace and was turning in the direction of the Sweet Waters.