Note 13 — The Conquest of Mindanao

Sabanilla, diminutive form of sabana (English, “Savannah”); a name given by Corcuera’s Spanish soldiers to the fortress which was constructed, under the direction of Father Melchor de Vera, at that point in Mindanao, south from Lake Lanao. Puerto de la Sabanilla was anciently called Tuboc, on account of the springs that flow there ... which form the river now named Malabang. The etymology of this last name indicates the formation of land by the deposits made by the river, which may also be seen in the delta of the Rio Grande of Mindanao. (Retana and Pastells, in Combés, col. 760.)

Tuboc is the name of a modern pueblo on the eastern shore of Illana Bay.