"I should say quite a couple of feet thick. I could only see a small patch of the water through it."
"Then I am afraid there is no chance of our working our way out," Jim said. "The only way of escape I can see would be to spring on those two fellows who bring our food. We are stronger than they are, I am sure, and we might master them."
"I don't expect we could do it without noise," Jack said. "Besides, they have got pistols, and we certainly could not master them without their being able to shout. We might manage one easy enough, if one sprang on him and held his arms and prevented him getting his pistol, and another clapped his hands over his mouth; but the three of us could not manage two silently. Besides, I should not like to hurt them after their bringing us that water to wash in."
"No; we certainly couldn't do that," the other boys agreed.
"Besides," Jack went on, "we do not know where this staircase leads. But no doubt it goes up into the house, and when we got to the top someone would see us at once; and even if we broke through there would be such a chase we should never get away, and anyhow could not pass through the town down to the port and steal a boat. No, Jim, I don't think it is the least use in the world trying to escape that way. If we could dig through the wall and make our way out at night, and get quietly down among the sand-hills by the shore, we might manage to get hold of a boat and row out to the ships; but I do not see that there is any chance of our being able to do that when we haven't got as much as a knife among us."
Jim examined the walls. "There would not be much difficulty in working through them if we had a couple of good knives, they are made of sun-dried bricks. However, we will hunt about among this rubbish and see if we can find some more bits of iron. Anyhow, we can wait a day or two before we make up our minds about it and see what comes of it. I vote we clear up this litter a bit, and chuck it out through the opening. There is a close, musty smell in the place. The opening will be very handy for chucking everything out and keeping the place as clean as we can."
"Yes, Jim; but the rubbish will be very useful to us if we decide to try to cut our way out, as we can put a lot of brick-dust and stuff under it. It would not do to throw that out of the window, for it would be seen at once by anyone passing."
"Yes; you are right there, Jack. Well then, we have nothing to do but to take it as easy as we can."
The closest search through the rubbish did not bring to light any other piece of iron, and the bit they had used as a knife was so thin and rusted as to be altogether useless for the purpose for which they required it.
The days passed slowly. The two Egyptians brought bread and water regularly, and the Nubian as regularly additions to their meal—sometimes fruit, sometimes a dish of meat. Three bundles of maize straw were brought down the first evening to serve as beds for them, and on the following morning three or four men came down and swept up all the rubbish from the floor. Once every two days they were taken out under a guard of three men with swords and muskets, and allowed to sit down in the sun, with their backs against the wall, for an hour or two. The shipping still lay in the harbour, over which they commanded a good view; and after a few days they saw that several more vessels of war had entered it.