Perseus also sent a common message to Eumenes II of Pergamon and Antiochus IV, the Seleucid king, which invited them to put pressure on the Romans for peace talks. The message to Antiochus was sent openly. The one to Eumenes was sent under the pretence of ransoming prisoners and some secret deals between the two of them occurred which caused suspicions in Rome and accusations that Eumenes II was a traitor. This was also related to a Cretan, Cydas, who was a close friend of Eumenes. He went to meet a countryman who served in the army of Perseus at Amphipolis, in Macedon, and then had conversations with two officers of Perseus under the walls of Demetrias. He had previously gone to Eumenes as an envoy twice. The fact that these secretive missions had taken place was notorious, but the precise nature of the dealings between the two kings was not known.