with him Roman troops. Finally, in 410, when Romano-British officials requested military assistance from Emperor Honorius, he told them to manage their own defences. Economic decline occurred after these events: circulation of Roman coins ended and the importation of items from the Roman Empire stopped. Saxon settlement Theories about the settlement of Saxons, Jutes and Angles in Britain are divided into two categories by the historian Peter Hunter Blair (1956), namely "Welsh" and "English". The Welsh tradition is exemplified by Gildas, in De Excidio et Conquestu Britanniae. In brief, it states that after the Romans left, the Celtic Britons managed to continue for a time without any major disruptions. However, when finally faced with northern invaders, a certain unnamed ruler in Britain (called "a proud tyrant" by Gildas) requested assistance from the Saxons in exchange for land. There were no conflicts between the British and the Saxons for a time, but following "a dispute about the supply of provisions" the Saxons warred against the British and severely damaged parts of the country. In time, however, some Saxon troops left Britain; under Ambrosius Aurelianus, the British subsequently defeated those who remained. A lengthy conflict ensued, in which neither side gained any decisive advantage until the Britons routed the Saxons at the Battle of Mons Badonicus. After this, there occurred a peaceful period for the Britons, under which Gildas was living at the time he wrote the De Excidio et Conquestu Britanniae. One of the "English" traditions about the Saxon arrival concerns Hengest and Horsa. When Bede wrote his Ecclesiastical History of the English People, he adapted Gildas' narrative and added details, such as the names of those involved. To the "proud tyrant" he gave the name Vortigern, and the Saxon commanders he named Hengest and Horsa. Further details were added to the story in the Historia Brittonum, which was partially written by Nennius. According to the Historia, Hengest and Horsa fought the invaders of Britain under the condition of gaining the Island of Thanet. The daughter of Hengest, Rowena, later arrived on a ship of reinforcements, and Vortigern married her. However, a war arose in Kent due to a dispute between Hengest and Vortigern's son. After losing several battles, the Saxons finally defeated the British by treacherously attacking them once the two parties had convened for a meeting. Some additional details of the Hengest and Horsa legend are found in the