“What do you make of that mark on her throat?”

“What do you make of it?”

“I have not examined it yet,” I answered, and then and there proceeded to loose the band. Just over the external jugular vein there were two punctures, not large, but not wholesome-looking. There was no sign of disease, but the edges were white and worn-looking, as if by some trituration. It at once occurred to me that this wound, or whatever it was, might be the means of that manifest loss of blood; but I abandoned the idea as soon as formed, for such a thing could not be. The whole bed would have been drenched to a scarlet with the blood which the girl must have lost to leave such a pallor as she had before the transfusion.

“Well?” said Van Helsing.

“Well,” said I, “I can make nothing of it.” The Professor stood up. “I must go back to Amsterdam to-night,” he said. “There are books and things there which I want. You must remain here all the night, and you must not let your sight pass from her.”

“Shall I have a nurse?” I asked.

“We are the best nurses, you and I. You keep watch all night; see that she is well fed, and that nothing disturbs her. You must not sleep all the night. Later on we can sleep, you and I. I shall be back as soon as possible. And then we may begin.”

“May begin?” I said. “What on earth do you mean?”

“We shall see!” he answered, as he hurried out. He came back a moment later and put his head inside the door and said with warning finger held up:—

“Remember, she is your charge. If you leave her, and harm befall, you shall not sleep easy hereafter!”