Ilustre obtained a law doctorate at the Universidad Central de Madrid. It was also in Madrid that he was in association with other Filipino patriots like Rizal, Plaridel, Naning Ponce, Galicano Apacible and others - whose chief preoccupation was resolving the seething Philippine situation. In 1913, he served as president of the Committee for Mindanao and Sulu to elect their own Mayor and Municipal president. He was born in Taal, Batangas on Sept. 6, 1869 and he died in Manila on Sept. 27, 1928 at the age of 59. He was survived by his wife, Doņa Rita Villavicencio, by whom he had no offspring.