 He authored the Charter of both the Cities of Basilan and Zamboanga.More Filipino settler families, such as the Cuevas-Flores-Pamaran-Antonio clan (progeny of the legendary Datu Kalun) in Lamitan and the Pardo, Barandino, Brown, Dans, Biel, Encarnacion, Dela Pena, Luistro, Zagala and Nuñal families of Isabela itself soon followed suit, establishing sizeable plantations, usually engaged in coconut/copra production.The outbreak of World War II disrupted Commonwealth administration.