Abstract: Distinctive Features:Hand-drawn map of tribal territories around Ras al Khaima with ports and valleys labelled, and routes indicated by pecked line. Muscat limits shown by hatched markings.Below map typed explanatory notes with references to the slave traffic, signed by Bertram S. Thomas and dated ‘16-11-26’.Physical description: Materials:Pen and ink on paper with typed textDimensions:315 x 202 mm