I'm a doctor. It's my job to be worried about everyone.

[He's grinning a little as he says it, though it fades.]

I'm glad to hear it. Honestly, these past few weeks my leg has been worse than usual. I can normally keep up much better than this. It's likely due to the lack of painkillers or distraction.

[Plus, having Holmes around often kept his mind off the pain, and he was more than willing to endure the white hot agony of his leg at its worst moments when on a case with Holmes. Watson can't count the number of times he's run alongside Holmes in pursuit of some criminal, his leg all but shrieking to collapse under him but adrenaline keeping his stride even.]