Rooftop Race (Jubair al Hakim)

Rooftop Race (Jubair al Hakim) was a virtual representation of one of Altaïr Ibn-La'Ahad's genetic memories, relived by Desmond Miles in 2012 through the Animus.

Description
Altaïr met with an Informant who told Altaïr that one of his colleagues has found some information on Jubair, although the Assassin would have to track him on his own.

Dialogue
Altaïr approached the Informant on a rooftop. Altaïr raced across the city's rooftops and found the other Informant.
 * Informant 1: Bad news, Brother. I killed a Templar this morning. Well, I suppose that's actually good news. I even found a letter on him which I gave to Numair, who said he'd find you and deliver it, but from the look on your face I suspect this hasn't happened. Go on then, don't waste any more time with me. Seek Numair and get that letter.
 * Informant 2: Altaïr, here, take this. I've been looking everywhere for you. Now I can finally return to Masyaf. Last time I offer to do someone a favor.

Outcome
Altaïr acquired a letter which stated Jubair was at Madrasah Al-Kallāsah, surrounded by his loyal followers.

Source

 * Assassin's Creed