In Mindanao Island only a small coast district here and there was really under Spanish empire, although Spain (by virtue of an old treaty, which never was respected to the letter) claimed suzerainty over all the territory subject to the Sultan of Sulu. After the Sulu war of 1876 the Sultan admitted the claim more formally, and on March 11, 1877, a protocol was signed by England and Germany recognizing Spain's rights to the Tawi Tawi group and the chain of islands stretching from Sulu to Borneo. At the same time it was understood that Spain would give visible proof of annexation by establishing military posts, or occupying these islands in some way, but nothing was done until 1880, when Spain was stirred into action by a report that the Germans projected a settlement there. A convict corps at once took possession, military posts were established, and in 1882 the 6th Regiment of regular troops was quartered in the group at Bongao and Siassi. Meanwhile, in 1880, a foreign colonizing company was formed in the Sultanate of Brunei, under the title of "British North Borneo Co." (Royal Charter of November 7, 1881). The company recognized the suzerain rights of the Sultan of Sulu, and agreed to pay to him an annual sum as feudal lord. Spain protested that the territory was hers, but could show nothing to confirm the possession. There was no flag, or a detachment of troops, or anything whatsoever to indicate that the coast was under European protection or dominion. Notes were exchanged between the Cabinets of Madrid and London, and Spain relinquished for ever her claim to the Borneo fief of Brunei. The experience of the unfortunate Sultan Alimudin (Ferdinand I.) taught the Sulu people such a sad lesson that subsequent sultans have not cared to risk their persons in the hands of the Spaniards. There was, moreover, a Nationalist Party which repudiated dependence on Spain, and hoped to be able eventually to drive out the Spaniards. Therefore, in 1885, when the heir to the throne, Mohammad Jamalul Kiram (who was then about 15 years old) was cited to Manila to receive his investiture at the hands of the Gov.-General, he refused to comply, and the Government at once offered the Sultanate to his uncle, Datto Harun Narrasid, who accepted it, and presented himself to the Gov.-General in the capital.