煉金術教材約莫西元13世紀羅克堡的居民曾調配出許多「藥劑」與「靈藥」，用於溫室內的植物實驗，目的不外乎是促進生長或將其滅除。至於當年所使用的確切配方，如今已不得而知。
英文原文
An alchemical textbook
c. 13th century
Many 'potions' and 'elixirs' were developed by the people of Castle Rock to use in their botanical experiments, either to encourage - or kill - plants within the greenhouse. The exact formulas used are unknown.