Runes in good hands.

I've been trying to find Skelg for about two hours now; he's the one who makes the potion for the mummy. You write, "Read carefully!" I am reading! The potion can be made by the Alchemist Skelg! The castle is called Skelg; I go into Skelg, but there's nothing there. I go to the alchemical laboratory, and it's empty! I've searched the entire dungeon, and Skelg isn't there. Where is the alchemist Skelg?