All that smoking and drinking and being out in the rain (and probably visiting sickbeds) has to catch up with a vicar sometime. And when it does Mrs. M fusses, Leonard frets, and Dickens whines until he's allowed to curl up at Sidney's feet. But Geordie isn't worried at all. That's definitely why he turns up with the backgammon board.
Grantchester, Sidney-centric sickfic