On 15 July, he surrendered Jerusalem to Raymond of Saint-Gilles[1] in the Tower of David and was escorted out of the city with his bodyguard.
Usama ibn Munqidh's autobiography mentions an emir of the local castles of Abu Qubays, Qadmus and al-Kaf called Iftikhar al-Dawla whose sister was married to Ibn Munqidh's uncle, the ruler of Shayzar.
[3] Tasso, The Liberation of Jerusalem, canto 3.60 says that he met Godfrey of Bouillon “in the high court of France where I came as Egypt’s envoy long ago.” (Max Wickert translation.)
Hearing of the advance of the Franks he poisoned the wells outside Jerusalem; moved livestock from the pastures inside the city walls and sent urgently to Egypt for reinforcements.
[4] Although the garrison was well-supplied it was insufficient to man all the walls and was overwhelmed after a siege lasting six weeks.