Gradually a greater amount of liberty was given to Gervaise.  Escape from Tripoli was deemed impossible, especially as he was supposed to be entirely ignorant of Arabic.  He was, indeed, scarcely regarded now as a slave by the head mason, and instead of being clad in rags was dressed like other overseers.  He was no longer obliged to walk with the gang to and from the palace, and was at last granted permission to go into the town for an hour or two after his work was over, instead of returning direct to the prison.  The first time this permission was given to him he placed himself on the road by which Ben Ibyn would leave the town, choosing a quiet spot where the meeting would not be observed.  Gervaise had for some time taken to staining his face, hands, and legs with walnut juice, beginning with a weak solution, and very gradually increasing the strength until he had reached a shade approximating to that of the lighter coloured portion of the population.  The head mason had on one occasion noticed it, and said, “The sun is darkening your skin, Gervaise, until you might verily pass as a Moor.”

Gervaise detected an expression of doubt in the tone the officer had spoken to the interpreter, and replied at once, “It is not altogether the sun.  Since I have obtained permission to come to my work alone, I have taken to slightly darkening my skin, in order to go to and fro unmolested, and free from the insults that the boys and beggars hurl at Christians.”

The master mason nodded approvingly when the answer was translated to him.

“It is a wise step,” he said; “for truly the hatred of Christians is very strong among the lower classes, especially since it became known that the galleys that sailed from here nearly two years ago were, with all the fleet from which so much was expected, utterly destroyed.  It is well, then, that you should pass unnoticed, for were there a tumult in the street you might lose your life, and I should lose the best labour overseer I have ever had.”

Thus, then, as Gervaise walked through the streets on the first occasion of obtaining his liberty, he attracted no attention whatever.  When he saw Ben Ibyn approaching he stepped out to meet him.  The merchant looked in his face, but for a moment failed to recognise him, then he exclaimed suddenly, “It is Gervaise!  Ah, my son, I am indeed rejoiced to see you.  We have spoken of you so often at home, and sorely did my wife and daughters grieve when you were torn from us.  I did not dare to send any message to you, for the sultan pretended great anger against me, and used the opportunity to squeeze me hardly; but I have frequently made inquiries about you, and was glad indeed to find that even in prison you received promotion; had it been otherwise —­ had I found that you were in misery —­ I would have endeavoured, whatever the risk, to aid you to escape.”

“I have indeed nothing to complain of, and was sorry to learn that you had suffered on my account.  Have you ever learned how it came about that I was denounced?”