"A beehive?"

That startles him into a laugh. "Goodness. I hate to think what Mrs. Hudson would have to say about that. No, no beehive, not in the middle of London." Watson shakes his head. "Though... I have heard him occasionally speak of them with interest, but I'm not sure that means anything. Many things interest him."

The real answer is "not yet" but Watson can hardly be said to know that. "Does your Holmes have a brother? Mycroft Holmes?"