About 1047 Geoffrey began to look to the north for more land. Geoffrey attacked the castle of Château-du-Loir owned by Bishop Gervais. He did not capture the castle but burned some of it. Geoffrey did capture Bishop Gervais who he threw in prison. The Council of Reims in 1049 ordered Geoffrey to release his captive bishop or they would excommunicate him. Even when the pope did excommunicate Geoffrey the following year he would not release the Bishop. 