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 main 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. An additional foliation sequence is present in parallel between ff 13-17; these numbers are also written in pencil, but are not circled.