The fire was lit. Sherlock Holmes was going to explode any moment and Sadji would weather the storm whatever it would bring. No, she hadn't ruled out the syringe if only because the whole thing was ridiculous. To cause such quick hallucinations, surely it would have to be a very powerful drug or quite a lot of it. She didn't honestly know because it would never occur to her to use some kind of technical science bullshit. She was old school. And that manic grin that followed the declaration of her age was almost hilarious. He positively reeked of desperation at that point. "I could teach you to read them - that and Babylonian, Assyrian, their parent Akkadian, Pictish, true Norse," she had likely forgotten more languages than he could chance to learn.
She listened as he explored her things from shoes to desk, unlocked from inside by the sand just for him. She didn't protest the way he knocked things around - she never kept artifacts on it just in case. But almost in a bored tone, she noted, "You will be paying for anything that's been broken." It wasn't a request. She listened when he was finished, the way his heavy footsteps came towards her. There was anger in them. He had not found what he wanted. The smile she offered him was sweet and innocent, the first time she had put on a mask around him and it was entirely just to irritate him further as she listened.
"I thought it would be obvious that you weren't injected with anything." She had hoped that he would look at the page she had lingered on just for kicks. Mostly because she was definitely an asshole when she wanted to be. She could have stopped him but chose not to. He was fast but she was faster. It was out of curiosity that she did not move but simply shut her book and gently tossed it aside so it wouldn't get harmed or torn. Honestly, getting physically searched was not something that she had expected but interestingly enough, he wasn't too invasive with it. Surely something of that British politeness.
She sat forward as he tried to completely cover her, to take that threatening control. "There is no syringe. I injected you with nothing. I only want my prize for besting you." The sound of his pulse, his blood racing, almost drowned everything else out for Sadji. With that blinding speed again, she gathered up the front of his shirt in one hand and lifted him off his feet as she stood. Although it was not gentle, it was not an attempt to slam him down either. She simply dropped him like a ragdoll on the opposite couch. "Mister Holmes, when you enter the viper's den, you should expect to be bitten."
Then, as calmly as she could be, she went back to her seat and picked her book back up, crossing her legs idly. When would he break? When would he decide he had descended into madness and there was no way out? Surely a feat of strength like that would give him some hint as to the truth of his situation. After all, there was no sign of anyone else coming in during that brief moment of 'hallucination'. It was just them.