Can anyone give me some help for the following problem...In Dorn's deep how do I get Bandoth to give me the location to Lower Dorn? All he does is offer me spells to buy. I went and got the Razorvine extract, and have it in my inventory, but don't seem to be able to give it to Bandoth.

You dont really need him to go on.
SPOILER
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- In that cavern, go to the east and you´ll find a passage. Enter there, fight your way to the room where a round table is, and there you must open a secret door. Enter, and go to the center of the room (if you get hurt, just take a look at the table in the previous room, it will help you ;) ). After you do this, just go back to the previous room, "use" a statue whose halberd has moved, and go back to the circular room, where you´ll find some stairs now.