Holmes: "There is a toxin, refined from the nectar of the rhododendron ponticum. It's quite infamous in the region of Turkey bordering the Black Sea for its ability to induce an apparently mortal paralysis. Enough to deceive even a medical mind as tenacious and well-trained as yours. It's known locally as..."
Mary: "What's wrong with Gladstone?"
Holmes: "...mad honey disease. Oh, he's just demonstrating the very effect I've just described. He doesn't mind."