[He does indeed know exactly what she means. And while he's no stranger to her 'visions', the news none the less comes as something of a surprise - this world may be similar enough to their own to cause no trouble when it comes to spellcraft, but the Echo is quite another matter.

It's enough to have his eyes narrow slightly, and if she'd hoped to catch his attention, she has certainly done that.]

A vision? Here, of all places?

[Still, he doesn't doubt her words. Unexpected though they may be, there is nothing to be gained from lying about such things - and she's never struck him as the type to, besides.]

Though if it were capable of stealing away a person's memories, that would certainly explain why we might only just be hearing of it now.

[Why it might have taken the Echo to bring those memories to the fore, even.]

I presume you mean to make an attempt at finding it?