"I know not where the mines lie, other than those that are delved daily by the people of Phandelver. This castle though, that I can divine. Hold here"

Agatha disappears and then reappears a couple of minutes later.

"Cragmaw is in the Eastern reaches of these very woods, almost directly North of Phandalin. Not too far in from the border, from what I can scry"

"I tire of this. Leave me now. That last one has sapped my remaining patience."

With that, she disappears 

Brand bids farewell and steps outside with the others. 

"Well we have some undead and orcs to purge. Sister, i believe we fulfilled your request."

"Thank you all. I will relay the information to my superiors for further inquiries to be made afield. I can make my own way back if you have other tasks to perform"