Looking for Two Fics
I think the first one was on fanficiton.net, and it might have been in a collection of one shots. I can't remember where the second one was.
My memories are fuzzy, but heres what I remember:
Arthur is in his chamber, and then merlin comes in, acting kind of odd. Arthur asks what's wrong, and I think Merlin kneels, and asks for an audience with the king. He's being very formal, so Arthur knows he's no joking. (I think Merlin might have even given Arthur his sword, in preparation of him killing Merlin on the spot.) Then Merlin tell Arthur that he has magic.
In the second one, Merlin is made a sort of honorary knight. I think that Arthur, Melin and the knight leave the castle for some reason, and while they are away, Merlin's magic is revealed. I think Merlin collapses to his knees, expecting Arthur to kill him, but instead, Arthur knights him.
I think that he gives Merlin a piece of him cloak to wear as a neckerchief, because they can't reveal that he's a knight.