Many people were in charge of the cleaning, but they asked Maria, a family descendant, to clean the room. They were clearly making things tough for her on purpose.

“Oh, I know what to do,“ Maria replied unconcernedly.

Although Barbara wasn't there, it didn't stop her from inspecting Barbara's workplace.

“Sun Pill... Brightness Pill.. Concentration Pill.

By analyzing the residue of the medicine and the use of the instruments, Maria was able to determine which pills Barbara had attempted to produce.