Among other matters reference is made to the introduction of Christianity in the reign of Tiberius; the persecution under Diocletian; the spread of the Arian heresy; the election of Maximus as emperor by the legions in Britain, and his subsequent death at Aquileia; the incursions of the Picts and Scots into the southern part of the island; the temporary assistance rendered to the harassed Britons by the Romans; the final abandonment of the island by the latter; the coming of the Saxons and their reception by Guortigern (Vortigern); and, finally, the conflicts between the Britons, led by a noble Roman, Ambrosius Aurelianus, and the new invaders.
Of his most important work (On Acute and Chronic Diseases) only a few fragments in Greek remain, but we possess a complete Latin translation by Caelius Aurelianus (5th century).
His knowledge of disease and surgical skill were, as appears from the accounts given by Celsus and Caelius Aurelianus, very considerable.
Soranus is known by a work, still extant in the Greek original, on the diseases of women, and also by the Latin work of Caelius Aurelianus, three centuries later, on acute and chronic diseases, which is based upon, if not, as some think, an actual translation of, the chief work of Soranus, and which is the principal source of our knowledge of the methodic school.
For some centuries the methodic school was popular at Rome, and produced one physician, Caelius Aurelianus, who must be pronounced, next to Celsus, the most considerable of the Latin medical writers.
Caelius Aurelianus, already referred to as the follower of Soranus, must be mentioned as showing the persistence of the methodic school.
Merlin (Myrddin), the famous wizard, bard and warrior, perhaps an historical figure, first introduced by Geoffrey of Monmouth, originally called Ambrose from the British leader Ambrosius Aurelianus, under whom he is said to have first served.
In the third century, the period of Aurelianus and Gallienus, with its wild warfare of Romans and Persians, and of Roman pretenders one with another, seems especially to have aroused the spirit of prophecy.
AMBROSIUS AURELIANUS, leader of the Britons against the Saxons in the 5th century, was, according to the legends preserved in Gildas and the Historia Brittonum, of Roman extraction.