Thus, just after his baptism, Augustin shews but one desire: to bury himself in a retreat, to lead a humble and hidden life, divided between the study of the Scripture and the contemplation of God. Later on, his enemies were to accuse him of having become a convert from ambition, in view of the honours and riches of the episcopate. This is sheer calumny. His conversion could not have been more sincere, more disinterested--nor more heroic either: he was thirty-three years old. When we think of all he had loved and all he gave up, we can only bow the head and bend the knee before the lofty virtue of such an example. In the course of the summer the caravan started and crossed the Apennines to set sail at Ostia. The date of this exodus has never been made quite clear. Perhaps Augustin and his companions fled before the hordes of the usurper Maximus, who, towards the end of August, crossed the Alps and marched on Milan, while the young Valentinian with all his Court took refuge at Aquileia. In any case, it was a trying journey, especially in the hot weather. When Monnica arrived she was very enfeebled. At Ostia they had to wait till a ship was sailing for Africa. Propitious conditions did not offer every day. At this period, travellers were at the mercy of the sea, of the wind, and of a thousand other circumstances. Time did not count; it was wasted freely. The ship sailed short distances at a time, skirting the coasts, where the length of the stay at every point touched depended on the master. On board these ships--feluccas hardly decked over--if the crossing was endless and unsafe, it was, above all, most uncomfortable. People were in no hurry to undergo the tortures of it, and spaced them out as much as possible by frequent stoppages. On account of all these reasons, our Africans made a rather long stay at Ostia. They lodged, no doubt, with Christian brethren, hosts of Augustin or Monnica, in a tranquil house far out of earshot of the cosmopolitan crowd which overflowed in the hotels on the quay.