In the document of Governor-General Luis Perez de Dasmarinas in the Account of the Encomiendas for the King of Spain furnished on June 21, 1591. Dasmarinas mentioned that Alcaldia of Bulacan was part of La Pampanga with the Encomiendas subject to it such as the Encomiendas of Malolos (3,600 persons), Binto (2,000 persons), Guiguinto (2,000 persons), Caluya (2,800 persons), Mecabayan (2, 800 persons) and Bulacan identified as " capital" and residence of "alcalde mayor" with 4,800 persons. In the same 1591 document, it was mentioned that Calumpit y Hagonoy belongs to Juan Moron with the 12,800 persons, 2 Augustinian Convents, and One Alcalde Mayor of its own.