I was recently reminded about this gem by someone on merlin_finders and thought I'd rec it here.
Fandom: MERLIN
Pairing: Arthur/Merlin
Wordcount: 15000
Author on LJ: rosemaryandrue
Summary: Merlin has a diabetic emergency while stuck in an elevator with Arthur. After essentially saving his life, Arthur is suddenly very interested in Merlin's health.
Why this must be read: Omg, Arthur's intense concern over Merlin's health is priceless, as is the fact that Merlin absolutely has no idea what to do with it. This is a story I like to go back and read again and again. You'll want to bookmark it.
Link:
A New Low