Abstract
In June 1890 Lord Salisbury negotiated an agreement with Germany ceding Heligoland in return for the renunciation of German claims to Uganda, the cession of the German protectorate over the East African coast north of Witu, and the recognition of a British protectorate over Zanzibar. Although France was a party to the Joint Declaration of 1862 which guaranteed the independence of Zanzibar, Salisbury did not consider himself bound to consult her about the proposed change in the island's status. More surprisingly, he offered no assurance that French rights in Zanzibar would continue to be respected. When the French protested, Salisbury apologized for this oversight and entered into negotiations with their ambassador, W. H. Waddington. On 5 August a new agreement was signed whereby France recognized the British protectorate over Zanzibar in exchange for the recognition of her own protectorate over Madagascar and of her sphere of influence ‘south of her Mediterranean Possessions, up to a line from Say on the Niger, to Barruwa on Lake Tchad, drawn in such a manner as to comprise in the sphere of action of the [Royal] Niger Company all that fairly belongs to the Kingdom of Sokoto’.

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