Abstract: This file contains correspondence between officials at the British Consulate in Muscat, the Political Residency in Bahrain and the Foreign Office regarding the delineation of the border between Saudi Arabia and the Sultanate of Muscat and Oman.Physical description: Foliation: the foliation sequence (used for referencing) commences at the front cover with 1, and terminates at the inside back cover with 18; these numbers are written in pencil, are circled, and are located in the top right corner of the recto side of each folio. A previous foliation sequence, which is also circled, has been superseded and therefore crossed out.