Puzzles, by Patrick Askew

I came away from the auction with a small box of Chinese bric-a-brac, which I had bid for because I liked the look of a piece of jade which formed one of the items. When I got it home, however, the jade turned out on closer inspection to be obviously modern, and not even very good quality at that; and I was relieved I hadn’t bid more. 
   Most of the other items in the box were frankly rubbish, but one or two attracted a second glance, if only to try to convince myself that my money hadn‘t been completely wasted. There was a carving in dark wood, beneath a glass dome smaller than a child’s fist, consisting of a man in a robe seated at a table. There was a teapot and a cup detached from the main carving and lying loose: probably the carving had been broken, but somehow it reminded me of those cheap little toys where you have to manoeuvre ball-bearings through a maze, or into slots in a picture. I even attempted to shake the dome to get these objects back onto the table, but failed miserably and gave up after a few goes. 
   At the bottom of the box was a medallion the size of a coin, on a chain. There were characters I couldn’t read on one side of it, and it surprised me, because I didn’t think it was the sort of thing the Chinese went in for. I suspected it wasn’t really Chinese at all, and I certainly didn’t find it at all attractive, but in an idle moment I hung it round my neck.
   For some reason, I suddenly felt an overwhelming desire to return to the game, or whatever it was, under the glass dome. I shook it, and it took very little time or effort to get the cup and teapot into their right places on the table; but somehow they weren’t tiny any more: the whole carving had expanded until it was life-size, and I was right there beside it, watching. And the man in the robe was alive and moving. I watched as he poured himself a cup of tea, and then picked it up to drink it. And I realised that he mustn’t drink it, because the tea was poisoned; and I tried to shout at him not to, but no sound came out.The poison must have been very potent, because he collapsed almost immediately. And he realised what had happened to him, because he was able to lift his head from the table to look directly up at me, and his look said,
“YOU DID IT!”.