The mirror had me frustrated at first, you need to make sure that the mirror is submerged, use the pool of water you find on the right side of the map, and move it around a bit until it works. Took me about 4 drops before finding a deep enough spot.
The herbs if I remember correctly is a dialog choice, when you have the drunum (can't remember the exact name), you can go to george and he'll be jones'ng for them and ask if you brought them.
Hope that helps,
