Manumission was of two kinds justa or regular, and minus justa.
Of manumissio justa there were four modes: (I) by adoption, rarely resorted to; (2) by testament, already recognized in the Twelve Tables; (3) by census, which was of exceptional use, and did not exist later than the time of Vespasian; and (4) by vindicta, which was the usual form.
The manumissio minus justa was effected by a sufficient manifestation of the will of the master, as by letter, by words, by putting the pileus (or cap of liberty) on the slave, or by any other formality which had by usage become significant of the intention to liberate, or by such an act as making the slave the guardian of his children.
He favoured the embassy in every way, and when the body of Santa Justa could not be found, helped the envoys who were also aided by a vision seen by one of them in a dream, to discover the body of Saint Isidore, which was reverently carried away to Leon.
Among his other works are his Annotationes in Biblia (1607), of which an English translation (Pious and Learned Annotations upon the Holy Bible) was published in London in 1648, and various polemical treatises, such as De fictitio Pontificiorum Purgatorio (1619); De justa secessione Reformatorum ab Ecclesia Romana (1628); De Antichristo, &c. He also published French translations of Sarpi's History of the Council of Trent, and of Edwin Sandys's Account of the State of Religion in the West.