Mirandaola's letters of 1569 and 1574 are bound together. Regarding the MS. of "Requisitions of supplies" (1571?), see Bibliographical Data of _Vol_. II, under "Letter to Audiencia of Mexico" (1565). The account of the conquest of Luzón (1572) has been published by Retana in his _Archivo bibliófilo filipino,_ t. iv, no. 1; our translation is made therefrom. The original MS. of Diego de Artieda's relation (1573) is conserved in the Museo-Biblioteca de Ultramar at Madrid; its pressmark is "711, 20-3_a_, caja n_o_ 22." The MS. ascribed by some former archivist to Juan de la Isla, but apparently almost identical with Artieda's (see notes thereon in the text), is in the Archivo de Indias at Sevilla; its pressmark is: "Simancas--Filipinas; Descubrimientos, descripciones y poblaciones de las Islas Filipinas; años 1537 á 1565; est. 1, caj. 1, leg. 1|23." It is out of its proper chronological place. We have adopted the Madrid MS. for our text, because it contains Artieda's signature; but have incorporated therein all additional matter, or important changes found in the Sevilla copy, as has been stated _ante_, note 54. The letter of Enriquez (1573) is taken from _Cartas de Indias_ (Madrid, 1877), pp. 290-296; the material for this publication is found, as stated by the editors, in the Archivo Histórico Nacional, Madrid; but they do not locate therein the documents selected by them. Riquel's relation (1574) is a MS. in the Archivo general of Simancas; its pressmark is: "Secretario de Estado, leg. 155." In Museo-Biblioteca de Ultramar, Madrid, is a MS. containing part of the material of this document; it is bound with the Artieda relation. In the Real Academia de la Historia, Madrid, is another MS. (a copy by Muñoz) which is similar to the document of our text, in part; the MS. from which we translate may be a compilation from these other documents and from other letters written by Riquel which are alluded to therein. The document of our text was written partly on shipboard (in a vessel which left Manila July 1, 1573), and completed at Mexico, from which city it was despatched to Spain in January, 1574. The royal decrees of 1574 are taken from _Doc. inéd. Amér. y Oceania_, xxxiv, pp. 68-71; the originals are probably in Sevilla. The decree forbidding encomiendas to royal officials is at Sevilla, its pressmark being, "Simancas--Secular; Audiencia de Filipinas; Cartas y expedientes de los oficiales reales de Filipinas vistos en el Consejo; años 1564 á 1622; est. 67, caj. 6, leg. 29." Sande's relation of 1576 has been published in Retana's _Archivo_, ii, no. 1.