Abstract: This file concerns the movements of Wilfred Thesiger at the end of his second crossing of the Empty Quarter [al-Rub‘ al-Khālī]. Correspondence in the file is between the Political Officer, Sharjah; the Political Agent, Bahrain; the Political Resident, Bahrain; the Political Agent, Muscat; the Residency Agent, Sharjah; G W Furlonge and B A B Burrows, Foreign Office, London; and Richard ('Dick') Bird, representative of Petroleum Development Oman.Details concern Thesiger’s arrival in Abu Dhabi on 16 March 1948 and his intention to proceed to Buraimi [al-Buraymī]; the preference of the Sultan of Muscat for Thesiger not to visit Muscat and the cancellation of his visa to enter the Sultanate of Oman; Thesiger's intention to collect plants and animal specimens at Buraimi and to travel from Abu Dhabi to Bahrain by dhow; Bird's desire that Thesiger should not proceed anywhere south of the village of Hafit [Ḥafīt]; Thesiger's legal status during his travels and restrictions on his movements; the retention of Thesiger's Bedouin and their raid on Bani Qitab; his arrival in Bahrain; requests by Thesiger for ammunition; concerns that he was responsible for raiding in Saudi Arabian territory; and his nickname 'Mubarak bin London'.The file also includes summaries of intelligence gathered from Thesiger (ff 38, 42) and Bird's letter regarding Thesiger's presence in Buraimi (ff 54-55).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 64; 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 1-61; these numbers are also written in pencil, but are not circled, and are located in the same position as the main sequence.