Around 1510, Adad was hired by the Byzantines to work for them in Masyaf. Not knowing what he was looking for exactly, Adad spent an entire year locating and making his way to the antechamber that held the door to Altaïr's library. Upon reaching it, he attempted to break through the door. However, after three months, he was still unable to make even the slightest dent in the stone, which seemed harder than steel to him. Adad told him all he knew, revealing that the Captain had a certain journal that contained information on the keys to the library.