He isn't sure how to interpret this obvious unwillingness to part. It isn't as if there's affection rolling off Watson; if they were to stay together, he isn't sure what would happen, what they would talk about, if they would come to any kind of reconciliation. It's probably best that they do split up now; Holmes will be glad of the chance to think, anyway.

He feels rather like he and Watson have been stuck together with glue, and prying away from each other now will pull off skin.

"Yes, we will meet again soon. Try to... Do be careful," he says, emotion leaking out before he can stop it. He turns and starts for his room -- not his room anymore, he reminds himself with a pang -- because that's how he'll escape undetected. He really needs to separate himself from Watson, anyway, if either of them hopes to leave now.