Ooooookay, a couple checks I'd like to make, if that's alright. The first, is a reality check. When I say Amos pinches himself hard, I mean like a point of subdual damage hard. The kind of pinch a schoolyard bully gives you when he's telling you to give up your milk money, but after you cough it up, he still wants you to cry "Uncle!". Is he alive, is he dreaming, is he dead... is it even possible for him to figure any of those things out yet?
After that, Amos' gear. What has become of it? If necessary, I'd like to take 20 on a Search check for it, or at least, I'd like to know for a fact that I don't have it.
Lastly, Amos knows the following languages: Common, Dwarven, Elven, Gnome, and Sylvan. In the event that the runes above the door are in none of those languages... then... well, it's really up to you whether or not Amos understands, or is at least able to decipher, the "writing on the wall", regardless of what languages he knows. However, even with that in mind, he'll still take some time to look into the matter.
EDIT: Also, another pressing question. ...is Amos still naked? What the deuce? ...it's because he's a bard, isn't it?