But although I did not see any way of escape I did not feel as if we were going to die. I suppose that youth and a sanguine temper enabled me to keep hoping. Anyhow I found myself again and again reckoning upon a return to civilisation. But what kept my thoughts busiest was the fact that Jack and I were to be separated next day, and I asked myself over and over again, what could be the purpose of such separation. And here, after a while, I thought I saw my way a little. Such and such at least I felt I could say is not the purpose. Foul play is no doubt what our host is quite capable of; but what is to be gained by foul play? Why not kill either or both of us openly if he wishes? And when I had gotten as far as that I began to see, clearly enough, part at least of his purpose in separating us. And the revelation was greatly more flattering to Jack than to myself. Then I fell asleep and slept quite soundly for some hours, and I got up quite refreshed. After we had dressed and refreshed ourselves there still remained an hour before it would be time to keep our appointments. For Jack had arranged with the man who had been told off to keep him company to meet him at nine o’clock, the same hour at which I was to meet Signor Davelli. And here I may as well mention that these men or whatever they were, understood our way of reckoning time. But they did not, as far as I could see, make use of it themselves. They had a method of reckoning time but I was not able to discover exactly what it was. I have sometimes thought since then that they were able to measure the earth’s diurnal motion directly. But they used no clockwork nor (as far as I could see) any observation of the altitude of sun or stars. In some of the cars which were fitted for long voyages there was fixed an instrument about a foot long, and this consisted of a hand moving along a graduated scale. I made sure (so far as my very brief opportunity of observation permitted) that this hand did not move by clockwork, but I was quite unable to discover by what power it did move. I told Jack very briefly about the light I had seen last night, and then we held a brief conference before we parted. “Jack,” said I, “you thought yesterday that Signor Niccolo had given his man instructions either to kill you or to put you in the way of killing yourself?” “Yes,” he said, “under certain circumstances. If I attempt to make my escape the fellow is undoubtedly under orders to compass my death. But not otherwise; certainly not at present. And I need not say that I am not going to attempt my escape without you. If you and I agree to force a crisis, good and well; then we shall both run the risk of our lives. But you seem to think, and I am disposed to agree with you, that we had better for the present keep on the watch and let things take their course. Very well, then, I shall not be in any special danger to-morrow.” “Why do you think so?”