From the Journal of Freavgarth the spell weaver

Careful analysis of the contents of healing draughts and other elixirs found throughout these halls has revealed an interesting fact.  All of these potions are made of ingredients similar to those found in the Chemists' Room.  I must return to that room to examine the bottles there more closely.  If I can find the pure extract used in the Lazarus potions... the possibilities astound me!