"If you can guarantee his safety, and that your suite is secure during the procedure, then I'd have no objections to bringing him along," Barnaby replied.

Kotetsu knew him better than anyone else -- something Arthur probably had picked up on, or else he likely wouldn't have made the suggestion. To be honest, it would help to have him there, and Kotetsu would probably find it preferable to sitting on his hands and waiting alone in the real world. Still, Barnaby had to look at it from as many angles as possible before telling his partner about the idea.