I FINALLY tracked down this book that I had heard about. It is the biography of Virginia Garcia Dominguez, born in Jolo in 1923, written by Nelson Navarro and fittingly titled Born in Jolo. It was published in 2017, making it one of Navarro's last books of worthwhile and significant biographies.
The principal, Virginia Garcia Dominguez, was the daughter of Dr. Paciano Garcia, an Ilocano from San Nicolas, Ilocos Norte, and Ernestina Clarke Ubeda, an Intramuros girl of Filipino, Chinese, British and Spanish descent. Dr. Garcia, one of the first graduates of the University of the Philippines College of Medicine, had joined government service in the Philippine Constabulary as a doctor in Mindanao and eventually accepted the post of director of the government hospital in Sulu. He met Ernestina at her grandmother's boarding house in Intramuros. She was 18 and he was 11 years older when they married and left Luzon to go to the unknown: Mindanao in the early 20th century.