"That's the thing, I don't want him to figure it out," Mycroft insisted. Still a bit baffled by why it was so important but it was. Sherlock must stay away at all costs.

"More people?" A bewildered frown. "What will they do? It's a bit full in here already, isn't it? I'm not sharing this room with anyone, don't be absurd..."

...where exactly was here, again? He couldn't place it. That was...worrisome.