He showed his empty case.
'By the way,' he said, 'if the doctor should happen to come in and notice the smell of the smoke, don't tell him that you had one of mine.

My tobacco is rather strong, and he might think it would do you harm, you know.

I see that you have some light ones there, on the table.

Just let him think that you smoked one of them.

I promise to bring some more to-morrow, and we'll have a couple together.' That was what Logotheti said, and it comforted Mr.Feist, who recognised the opium at once; all that afternoon and through all the next morning he told himself that he was to have another of those cigarettes, and perhaps two, at three o'clock in the afternoon, when Logotheti had said that he would come again.
Before leaving his own rooms on the following day, the Greek put four cigarettes into his case, for he had not forgotten his promise; he took two from a box that lay on the table, and placed them so that they would be nearest to his own hand when he offered his case, but he took the other two from a drawer which was always locked, and of which the key was at one end of his superornate watch-chain, and he placed them on the other side of the case, conveniently for a friend to take.
All four cigarettes looked exactly alike.
If any one had pointed out to him that an Englishman would not think it fair play to drug a man deliberately, Logotheti would have smiled and would have replied by asking whether it was fair play to accuse an innocent man of murder, a retort which would only become unanswerable if it could be proved that Van Torp was suspected unjustly.