That laugh is worrisome, and he tentatively reaches out a hand, too uncertain of the moment to be more confident in his touch; he lays his hand against Watson's good shoulder.

"We're even," he says thickly, and he gives his shoulder a light squeeze. "Though I think you've come out the worst. Coats are far more difficult to replace than handkerchiefs." Thin humor is the best he can offer because he's afraid to discuss the situation; he realizes neither one of them has a strong grasp on the situation, but he can't come apart too much until Watson's job is done.