A file of correspondence, reports and memoranda concerning the continued renegotiation of the terms of the Berlin air corridor. The documents discuss how transgressions of the boundaries of the corridors should be dealt with; accounts of a three-party meeting regarding the corridor containing the proposal that a future four-party meeting should be held shortly; British frustration at the Soviet rejection of a principle of no firing within the corridor; and a draft text of a joint statement made by the Allies to the Soviets to be read out at the next four-party talks, which recognises that compromises cannot be made on key issues and offers new proposals. Other documents include a report on the subsequent four-party talks; a suggestion that aircraft should not fire within the corridor except in self-defence whilst recognising the difficulty of enforcing this; and further discussion regarding reparations for those killed in the Lincoln bomber incident.