Guémé Sangan was a fortress of Koli Tenguella located at Télimélé. On 20 February 1888, Almamy Sori and the Chiefs of the Fouta Théocratique ceded Guémé Sangan, and territory of Koli Tengela's capital to the French negotiator Aimé Olivier de Sanderval. This was signed by Almamy Ibrahima Sori the son of d’Abdoul Gadiri and Thierno Ibrahima chief of the Province of Timbi Touni.[3]