"There is blood on the ticket," said Holmes. Watson rubbed his chin and took a draw on his pipe. "What could it mean?" Holmes thought for a moment before replying, his face white and his voice almost a whisper: "Moriarty".
Logically that would mean the ticket was in blood, but that's not the statement made above. The 'blood' is ON the ticket, not the other way around (It'll be weird though, but could serve as another weird Duolingo sentence ✌
Does this have any metaphorical sense? For example I might show my friend that I have a ticket to an animal circus show, and he'll response with something along these lines, implying there was torture and suffering behind this production.