Note 12 — EARLY FRANCISCAN MISSIONS
Reading edition
A reference to the great volcano of Mayón, in Albay. See full account of volcanoes in the Philippines, in Becker’s “Geology of the Philippine Islands,” in U. S. Geol. Survey Report, 1899–1900, pt. iii, pp. 525–542.
Sulphur can probably be obtained throughout the volcanic regions of the islands.