During the summer and autumn of 1636, a Mindanao chief named Tagal harries the coasts of Cuyo and Calamianes. Returning homeward laden with booty and captives, these pirates are attacked (December 21) by a hastily-gathered Spanish force of ships and men, and in this battle Tagal and many of his followers are slain, and most of their plunder recovered. This victory is a great gain to the Spaniards in maintaining their stand against the hostile Moros, and many of the latter are rendered submissive for the time being. An account of these events is given in a letter unsigned and undated, but evidently written early in 1637, and probably by the Jesuit Pedro Gutierrez. By order of the royal Council a compilation is made (February, 1637?) of all information in the government records pertaining to the office of auditor of accounts at Manila. The writer (some clerk in the government employ) gives a brief historical sketch of this office, its relations with the royal officials, the advantages and disadvantages connected with it, and the proceedings of the council regarding this office, up to 1637. The Moro raids of 1636 arouse the Spaniards to the urgent necessity of subduing those fierce and treacherous pirates; and Corcuera organizes an expedition to Mindanao, led by himself, for their punishment. Several accounts of this campaign (which had far-reaching consequences) are presented--largely from Jesuit sources, since members of that order accompany the governor, and it is their missions which are most endangered by the hostility of the Moros in Mindanao.