Being constrained to wait, Mariano busied himself in making the useful preparations. He wound the rope tightly round his waist, and covered it with a thin scarf such as was commonly worn by the Moors. He also trimmed and prepared a small lantern.

“Now,” said Bacri, looking at his watch, “you may go. But, stay—not in the direction of our usual passage. You could not move ten yards from my door to-night without being intercepted. Follow me; I have long been prepared for emergencies such as this.”

“Good-night, Angela,” said Mariano, extending his hand, as he prepared to follow the Jew.

“Oh, be careful,” said Angela earnestly. “From the little I have heard it seems that there is much danger impending.”

“What I can do to avert it shall be done,” replied the youth, kissing his hand to the girl as he passed through the doorway and followed his master to the terrace-roof of the house.

We have said that Algerine roofs are flat, but they are by no means regular. There are often various elevations on the same roof, and various forms, as if the architect had terminated the summits of the several walls and partitions at the dictates of a wayward fancy rather than a settled plan. In some cases a step—in others a flight of steps—formed the communication between one part of a roof and another, while division-walls varying from a foot to two yards in height, cut it up into irregular squares and triangles. Such roofs are eminently fitted for the game of “hide and go seek,” to which, doubtless, they have been applied more or less since the days of Abraham.

Issuing on the terrace of his house, then, Bacri pointed out to Mariano, by the light of the moon, which was slowly descending to its bed in the Sahel hills, that the roof of his neighbour’s house could be easily reached by a single step.

“You will cross over this roof,” he said, taking a ring from his finger and placing it on that of his slave, “and be sure that you tread with care until you come to the other edge of it, where you will be able to place yourself in the shadow of a chimney until a cloud covers the moon. My neighbour is not a friend, therefore tread like a cat. Attend well to my directions now, and obey them implicitly. You require no arms. Whatever happens to you, offer no resistance, as that will only ensure death. When the moon is clouded leap to the next roof, which you may see now in line with yonder minaret. There is about six feet between the two—which is nothing to a youth like you; only be careful, for failure will plunge you into the street, sixty feet below. That terrace gained, you are on friendly ground. Go, knock gently at the door leading to the house below, and show the owner my ring, asking him at the same time to guide you to the street, after which you know how to act; and may the God of Abraham direct you. Stay! If the owner of the house, who is a Jew, should use you roughly, heed it not. Whatever you do, be passive. Your own life, and it may be the lives of others, depends on this.”

The first part of the Jew’s caution would have availed little, for when Mariano was roused he recked little of his own life; but the reference to others reminded him of Angela and his father, so that he made up his mind to be a very model of forbearance whatever should happen.

Stepping easily from the house of the Jew to the terrace of his neighbour, he proceeded with extreme caution to the chimney pointed out to him, and took his stand under its shadow.