Echoing Small Hobbit - I particularly liked the line A skipped beat or flutter in a 66-year-old man with a past history of cocaine usage is a canary staggering off its perch in a coal mine.

It's kind of poignant and touching, and also ironic, that Holmes has been so focused on Watson that he completely failed to notice what his symptoms indicated and didn't deduce he might need to see a doctor. And it's also touching that it's always Watson's needs that come first: He needed me now, to help him navigate a familiar world made strange, keep him away from the cliff's edge. If I died…