Harry and Severus went down into the Chamber every free minute for two weeks. Both for Harry – with the DA – and Severus – with his duties as a Professor and Head of House – free time was in short supply. The research wasn't easy since some of the books in Slytherin's library were written in parseltongue. When they discovered a few Potion Journals, apparently Slytherin had been an avid brewer, Harry thought that Severus would start salivating. But the man kept his composure. Maybe with Tom's help, he could translate one book or the other. If Severus was good. Harry grinned and pulled out the next book of the mind-magic section and deciphered the summary. It wandered onto the mountain of volumes he would have to translate in full.