Note 23 — Letters from Father Mateo Gisbert to the Reverend Fathers and Brothers of Veruela

The root of the plant gabe (Colocasia antiquorum variety) is highly prized and extensively cultivated, the leaves also being used as food. Of the resins and oils mentioned, piayo, also called conferal and galagala (Agathis orantifolia—Salisb.) is used for burning and lighting, and the manufacture of varnish; and balao or malapaho (Dipterocarpus velulinno—Bl.) is used for calking. See Census of Philippines, iv, pp. 121, 202, 221; and Philippine Gazetteer, p. 78.