Roger II had earlier asked Ioannes II for a Byzantine bride for one of his sons, but Ioannes' death had intervened. He now repeated the request to Manuel I, and Manuel sent Basileios Xeros as an envoy to discuss the question. Roger bribed Xeros to make concessions, inclusing framing a proposed pact in a form that gave equal status to the two rulers. This apparent success was turned to failure when Manuel ignored the pact. Xeros died on the way home to Constantinople before he could be punished. Roger built a fleet to exact revenge