He was born in Spain in about 1538 and studied law at the university of Salamanca. He was named bishop of Lima in 1580 and sailed to America. Full of apostolic zeal, he traversed his gigantic diocese three times, generally on foot, baptizing, teaching and confirming the natives. He assembled many synods and councils to make the Church strong, organised, and above all holy; and he strongly defended the rights of the natives, who were Spanish citizens according to the law but who were nevertheless being oppressed by the colonists and the provincial governors. He died in Lima on 23 March 1606. See the articles in WIkipedia and the Catholic Encyclopaedia.

Augustine was born in Thagaste in Africa of a Berber family. He was brought up a Christian but left the Church early and spent a great deal of time seriously seeking the truth, first in the Manichaean heresy, which he abandoned on seeing how nonsensical it was, and then in Neoplatonism, until at length, through the prayers of his mother and the teaching of St Ambrose of Milan, he was converted back to Christianity and baptized in 387, shortly before his mother’s death.

Violet is a dark colour, ‘the gloomy cast of the mortified, denoting affliction and melancholy’. Liturgically, it is the colour of Advent and Lent, the seasons of penance and preparation.