In 1619 the intermediate chapter session meets at Nueva Segovia, on which occasion the college of Santo Thomas at Manila is formally added to the province; an historical sketch of this institution is presented. In November of that year occurs an unusually severe earthquake in Luzón, of which various features and incidents are recorded. Among the buildings overthrown is the Dominican convent in Manila, all its inmates, however, escaping in safety. In 1621 Fray Miguel Ruiz is elected provincial. On November 6 of that year occurs a revolt among the Gadanes in northern Luzón, of which a full account is given. One of the Dominican missionaries, Fray Pedro de Santo Thomas, courageously goes alone and unarmed, to the mountain stronghold of the insurgents, to win them back; and some months later he returns with three hundred families of these rebels, who settle peaceably on the lower lands. Aduarte fills chapters xviii-xxvi with accounts of martyrdoms of Dominicans in Japan, during 1621-23, and sketches of their lives--matter which is presented to our readers in brief synopsis, as but indirectly concerning the Philippines. The election of provincial in 1625 elevates to that dignity Fray Bartholomé Martinez, who has long labored among the Chinese of Manila. In this year occurs another revolt among some of the Cagayán Indians; two religious are treacherously slain by them, and then they flee to the mountains. In 1626, Fernando de Silva sends an expedition to conquer Formosa, which is accompanied by Dominican missionaries, who hope to find in Formosa a stepping-stone to an entrance for them into China. A fortified post is established in the island by the Spaniards; the Dominicans act as spiritual guides for the soldiers, and, after learning the native language, are able to win the confidence of the inhabitants and begin instructing them. Many of the missionaries in the province die, but a reënforcement comes to them in this same year. In 1627 is held the intermediate chapter-session. By that time the revolted Mandayas have been pacified, and by the efforts of their Dominican pastors induced to return to their villages and to the care of the missionaries. In this year occur many martyrdoms in Japan, of which accounts are given. In 1628, the four orders of friars in the Philippines unite to send a reënforcement of missionaries to Japan, but this attempt is frustrated by the wreck of their ship. Aduarte at this time arrives at Manila with a large company of religious. A Spanish expedition is sent to Camboja, and the Dominicans send missionaries thither; but both enterprises result in failure. In Formosa they are making some progress.