sentences:  Zanzibar's commerce fell increasingly into the hands of traders from the Indian subcontinent, whom Said encouraged to settle on the island.After his death in 1856, two of his sons, Majid bin Said and Thuwaini bin Said, struggled over the succession, so Zanzibar and Oman were divided into two separate realms.Thuwaini became the Sultan of Muscat and Oman while Majid became the first Sultan of Zanzibar, but obliged to pay an annual tribute to the Omani court in Muscat.