Rooftop Race (Sibrand)

Rooftop Race (Sibrand) 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 Sibrand, although the Assassins 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: I hear you're looking for information on Sibrand. Karn's found something you'd probably find useful. Best track him down if you want it.
 * Informant 2: Safety and peace, brother. I've been looking everywhere for you. I stole this letter earlier today. Read it over, hopefully it'll be of use.

Outcome
Altaïr acquired a letter, which stated Sibrand was soon to return to his private vessel.

Source

 * Assassin's Creed