There is no contemporary evidence for Spanish participation in the First Crusade, but the late thirteenth-century "Gran conquista de Ultramar" refers to "a company of Spanish knights there had been" at the Siege of Nicaea in 1097, "guarding the count of Toulouse, whose chief he had nominated, Lord Pedro González the Roamer, who was a very good knight in arms, and was born in Castile." It goes on to narrate an event which supposedly took place during the Siege of Antioch (1097–98) after the horse of Robert II, Count of Flanders, was killed beneath him and he was forced to fight dismounted against a number of Turks. Two knights, one from France and the other Pedro González, came to his rescue, "but the Spaniard, who arrived first, gave such a great blow to the back of a Moor with the lance he carried in his hand that it came out his chest a cubit, and he left him dead on the ground." It is possible that the "Gran conquista" has confused Pedro González with the "Petrum de Castillione" mentioned in the "Gesta Francorum" as part of Raymond of Toulouse's army, and that the event at Antioch confuses Pedro with Peter Bartholomew, who had a vision at Antioch and found the Holy Lance.