- You may be looking for the original website manuscript.
Deckard Cain's Journal is divided into two parts, both of which can be found on Cain's desk in Act I of Diablo III. Retrieving them adds to A Quick Study achievement.
The parts read as follows:
Part 1[]
Part 1 is unlocked with The Fallen Star quest.
We have come at last to Tristram's old Cathedral. This is where Diablo, Lord of Terror, first corrupted mankind. This is where I may finally find the answers I seek. Leah worries after my safety, but I believe information vital to defeating the last lords of the Burning Hells can be found here.
Part 2[]
Part 2 is unlocked with the Reign of the Black King quest.
I wish that Leah could live a different life--a more normal life--but, alas, such is not her fate. When I pass, there is none but her to continue my work, and the future of this world hangs in the balance.