This portion of the fortifications continued to be a favourite point of attack also after the erection of Leo’s Wall. Here, as above stated, the rebel Thomas sought to break into the city in 822;[576] here, in 924, Simeon of Bulgaria and Romanus Lecapenus met to conclude peace,[577] taking the greatest precautions against the repetition of the treachery which disgraced the former meeting of a Bulgarian king with a Byzantine emperor. In 1047, in the reign of Constantine Monomachus, the rebel general Tornikius took up his position before these walls, and having routed a company of raw recruits who had sallied forth against him by the Gate of Blachernæ, would have rushed into the city with the fugitives, had not the difficulty of crossing the moat given the defenders of the walls time to close the entrance.[578] Through the Gate of Blachernæ the friends of Alexius Comnenus sallied from the city, in 1081, to join the standard of revolt against Nicephorus Botoniates; and it was at the Imperial stables outside the gate that they obtained horses to reach as fast as possible the Monastery of SS. Cosmas and Damianus, baffling pursuit by having taken the precaution to ham-string the animals they did not require.[579] In 1097, Godfrey de Bouillon encamped on the hills and plains without these walls. While the negotiations with the crafty Alexius Comnenus were proceeding, the envoys of the Crusaders were on one occasion detained so long by the emperor as to arouse suspicions of treachery on his part; whereupon a band of Crusaders rushed from the camp at the Cosmidion, and in their attempt to enter the city and rescue their comrades set fire to the Gate of Blachernæ.[580]