During this time, de los Reyes published in rapid succession multiple works: "Ilocandias" (1887), "Articulos Varios" (1887), "Las Islas Visayas en la epoca de la conquista" (1889), "Historia de Filipinas" (1889), and the two-volume "Historia de Ilocos" (1890). These and other works won him a measure of recognition as a scholar. By 1889, he was listed as a corresponding or honorary member of societies such as the "Imperial y Real Sociedad Geografica de Vienna", "Academia Indo-China de Francia", and the "Sociedad Española de Geografia Comercial".