 Konrad of Weinsberg, the king's representative, attempted to secure it for the Empire and had it prepared for a siege.But by August he saw the futility of this plan and in 1418 returned the castle to the control of the Schultheiss family.After lengthy negotiations, Bern was able to secure control of the County of Lenzburg as subtenants in 1433 and finally in 1442 of the castle.