Dracula by Bram Stoker Chapter 10 Page 18

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 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 it 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 tonight,”