Why did Daniel drink the Amnesia potion?

[tzb]

(09-14-2010 06:31 PM)tacc Wrote:  But don't forget to scatter you Diary everywhere to remind you of what you want to forget.

Actually one of the flashbacks (Guest Room I think?) reveals his diary was stolen at some point. I guess this implies that whoever took it scattered the pages, around the castle, in chronological order, neatly placed on various desks or tables.