X-Ray.
Richard sat down on his chair and saw Isaac looking at the words on the wall in shock and confusion.
He scratched his head and said, ''Isaac, what was the purpose of your visit?''
Isaac didn't answer that question. Instead, he pointed at the wall and asked, ''Fountain of Life... Why are you looking for it?''
Richard averted his gaze and didn't anyone want to know the real reason because it might remove his trustworthy reputation of being Chief Doctor and might make Isaac think that he was crazy.
''It's nothing; I just read about it in the book I found.'' Richard grabbed a book from the bookshelf and showed it to Isaac.
Isaac took the book and was surprised to see familiar text.
[Wickedly Wonderful - Tale of Baba Yaga]
It was exactly the same book he found in the abandoned hospital.
He turned pages until he found a page which talked about Fountain of Life, it has said to be able to give immortality for whoever drinks it.