[2] Andrés Ferrero took his monastic vow as an Augustinian Recollect in Order's Novitiate House at the Shrine of Nuestra Señora del Camino de Monteagudo (Navarra),[3] in 1865.

[2] After his ordination, Fray Ferrero as appointed professor in the Recollect's formation house in Monteagudo (Navarre), teaching philosophy, dogma, and moral theology.

[7] By that time Manila already fell into the hands of the Americans, and Governor-General Diego de los Ríos already transferred the Spanish Capital to Iloilo City, where Philippine Revolution has already reached full-blown.

[2] He also made effort to reopen St. Vincent Ferrer Seminary for the training of future clergy of Jaro in 1902, when order was reestablished after the two revolutions.

[8] The change of political sovereignty in the Philippines forced Bishop Ferrero to resign from his Episcopal See, on 12 June 1903,[7] leaving his beloved flock in Panay and Negros with a heavy heart.

He opted to spend the remaining years of his life in the Augustinian Recollect convent in Marcilla, Navarre, refusing any other Episcopal See offered to him.