[ Moiraine is not herself given to having visions; the last person she knew who was significantly gifted in Foretelling died in the throes of sensing the birth of the Dragon Reborn. She lifts her brows at Amos -- how does one have a ghost in one's head? -- but lets his comment pass, more focused on the here and now. ]

I was on a mission of great import to forestall a terrible evil in my world. [ Which is about all she'll say. Amos may not be from her world, so perhaps there's not quite so much risk in telling him the full truth -- but no. Moiraine isn't given to telling people things they don't need to know, and who knows what a careless slip of the tongue might lead to? ]

There was a young man with me -- a boy, really. I haven't seen him here.

[ She's worried over Rand, of course -- not that she's going to let it show. ]