He was jealous by nature, rather than suspicious.  He had been jealous of his wife while she had lived, though a more devoted woman never fell to the lot of a lucky husband.  Often, for weeks together, he had locked the door upon her and taken the key with him every morning when he left the house, though his furnaces were almost exactly opposite, on the other side of the narrow canal, so that by coming to the door he could have spoken with her at her window.  But instead of doing this he used to look through a little grated opening which he had caused to be made in the wall of the glass-house; and when his wife was seated at her window, at her embroidery, he could watch her unseen, for she was beautiful and he loved her.  One day he saw a stranger standing by the water’s edge, gazing at her, and he went out and threw the man into the canal.  When she died, he said little, but he would not allow his own children to speak of her before him.  After that, he became almost as jealous of his daughter, and though he did not lock her up like her mother, he used to take her with him to the glass-house when the weather was not too hot, so that she should not be out of his sight all day.

Moreover, because he needed a man to help him, and because he was afraid lest one of his own caste should fall in love with Marietta, he took Zorzi, the Dalmatian waif, into his service; and the three were often together all day in the room where Angelo had set up a little furnace for making experiments.  In the year 1470 it was not lawful in Murano to teach any foreign person the art of glass-making; for the glass-blowers were a sort of nobility, and nearly a hundred years had passed since the Council had declared that patricians of Venice might marry the daughters of glass-workers without affecting their own rank or that of their children.  But old Beroviero declared that he was not teaching Zorzi anything, that the young fellow was his servant and not his apprentice, and did nothing but keep up the fire in the furnace, and fetch and carry, grind materials, and sweep the floor.  It was quite true that Zorzi did all these things, and he did them with a silent regularity that made him indispensable to his master, who scarcely noticed the growing skill with which the young man helped him at every turn, till he could be entrusted to perform the most delicate operations in glass-working without any especial instructions.  Intent upon artistic matters, the old man was hardly aware, either, that Marietta had learned much of his art; or if he realised the fact he felt a sort of jealous satisfaction in the thought that she liked to be shut up with him for hours at a time, quite out of sight of the world and altogether out of harm’s way.  He fancied that she grew more like him from day to day, and he flattered himself that he understood her.  She and Zorzi were the only beings in his world who never irritated him, now that he had them always under his eye and command.  It was natural that he should suppose himself to be profoundly acquainted with their two natures, though he had never taken the smallest pains to test this imaginary knowledge.  Possibly, in their different ways, they knew him better than he knew them.