Notes, letters and reports by Sir [Gerald] Kennedy Trevaskis [former High Commissioner for Aden and the Protectorate of South Arabia, later part of Yemen] on the situation in the Gulf and its neighbours (Abu Dhabi [United Arab Emirates, UAE], Dubai [UAE], Sharja [Sharjah, UEA], Bahrein [Bahrain], Qatar, Saudi Arabia, Muscat and Oman [later Oman] and North and South Yemen [later Yemen]) in the event of Britain's withdrawal from the area, and threats to British interests.