"It shall be altogether safe," said Zorzi. "No one shall guess that I have it."

"No one must know. I would take you with me on this journey, but I wish you to go on with the experiments I have been making. We shall save time, if you try some of the mixtures while I am away. When it is too hot, let the furnace go out."

"But who will take charge of your daughter, sir?" asked Zorzi. "You cannot leave her alone in the house."

"My son Giovanni and his wife will live in my house while I am away. I have thought of everything. If you choose, you may bring your belongings here, and sleep and eat in the glass-house."

"I should prefer it."

"So should I. I do not want my sons to pry into what we are doing. You can hide the packet here, where they will not think of looking for it. When you go out, lock the door. When you are in, Giovanni will not come. You will have the place to yourself, and the boys who feed the fire at night will not disturb you. Of course my daughter will never come here while I am away. You will be quite alone."

"When do you go?" asked Zorzi.

"On Monday morning. On Sunday I shall take Marietta to Saint Mark's. When she has seen her husband the betrothal can take place at once."

Zorzi was silent, for the future looked black enough. He already saw himself shut up in the glass-house for two long months, or not much less, as effectually separated from Marietta by the narrow canal as if an ocean were between them. She would never cross over and spend an hour in the little garden then, and she would be under the care of Giovanni Beroviero, who hated him, as he well knew.