A freeborn man is one free from his birth, being the offspring of parents united in wedlock, whether both be free born or both made free, or one made free and the other free born. He is also free born if his mother be free even though his father be a slave, and so also is he whose paternity is uncertain, being the offspring of promiscuous intercourse, but whose mother is free. It is enough if the mother be free at the moment of birth, though a slave at that of conception: and conversely if she be free at the time of conception, and then becomes a slave before the birth of the child, the latter is held to be free born, on the ground that an unborn child ought not to be prejudiced by the mother's misfortune. Hence arose the question of whether the child of a woman is born free, or a slave, who, while pregnant, is manumitted, and then becomes a slave again before delivery. Marcellus thinks he is born free, for it is enough if the mother of an unborn infant is free at any moment between conception and delivery: and this view is right. 1 The status of a man born free is not prejudiced by his being placed in the position of a slave and then being manumitted: for it has been decided that manumission cannot stand in the way of rights acquired by birth. TITLE V. OF FREEDMEN Those are freedmen, or made free, who have been manumitted from legal slavery. Manumission is the giving of freedom; for while a man is in slavery he is subject to the power once known as 'manus'; and from that power he is set free by manumission. All this originated in the law of nations; for by natural law all men were born free--slavery, and by consequence manumission, being unknown. But afterwards slavery came in by the law of nations; and was followed by the boon of manumission; so that though we are all known by the common name of 'man,' three classes of men came into existence with the law of nations, namely men free born, slaves, and thirdly freedmen who had ceased to be slaves. 1 Manumission may take place in various ways; either in the holy church, according to the sacred constitutions, or by default in a fictitious vindication, or before friends, or by letter, or by testament or any other expression of a man's last will: and indeed there are many other modes in which freedom may be acquired, introduced by the constitutions of earlier emperors as well as by our own. 2 It is usual for slaves to be manumitted by their masters at any time, even when the magistrate is merely passing by, as for instance while the praetor or proconsul or governor of a province is going to the baths or the theatre.