When the news of this murder reached Spain, the king ordered an investigation and the punishment of the guilty, and in 1721 Governor Torre Campo arrived to put these mandates into execution. The culprits, however, were so high and so influential that the governor did not dare proceed against them; and although the commands of the king were reiterated in 1724, the assassins of Bustamante were never brought to justice. Treaty with the Sultan of Jolo.--In spite of the cowardly policy of the successors of Bustamante, the presidio of Zamboanga was not abandoned. So poorly was it administered, however, that it was not effective to prevent Moro piracy, and the attacks upon the Bisaya and Calamianes continued. In 1721 a treaty was formed with the sultan of Jolo providing for trade between Manila and Jolo, the return or ransom of captives, and the restitution to Spain of the island of Basílan. The Moro Pirates of Tawi Tawi.--To some extent this treaty seems to have prevented assaults from Jolo, but in 1730 the Moros of Tawi Tawi fell upon Paragua and the Calamianes, and in 1731 another expedition from the south spent nearly a whole year cruising and destroying among the Bisayas. Deplorable State of Spanish Defenses.--The defenses of the Spaniards during these many decades were continually in a deplorable state, their arms were wretched, and, except in moments of great apprehension, no attention was given to fortifications, to the preservation of artillery, nor to the supply of ammunition. Sudden attacks ever found the Spaniards unprepared. Military unreadiness was the normal condition of this archipelago from these early centuries down to the destruction of the Spanish armament by the American fleet. The Economic Policy of Spain.--Restrictions of Trade.--During the closing years of the seventeenth century and the beginning of the eighteenth, commerce seemed to have been actually paralyzed. That brilliant trade which is described by Morga, and which was at its height about 1605, was a few years later defeated by the miserable economic policy of Spain, pandering to the demands of the merchants of Cadiz and Seville. Spain's economic policy had only in view benefits to the Peninsula. "The Laws of the Indies" abound with edicts for the purpose of limiting and crippling colonial commerce and industry, wherever it was imagined that it might be prejudicial to the protected industries of Spain. The manufacturers of Seville wished to preserve the colonies, both of America and of the Indies, as markets for their monopoly wares; and in this policy, for two centuries, they had the support of the crown. The growing trade between Mexico and the Philippines had early been regarded with suspicion, and legislation was framed to reduce it to the lowest point compatible with the existence of the colony.