The same twofold division of the Pictish nation existed among them till at least the eighth century, when Bede wrote his Ecclesiastical History of the English nation, for he tells us that the provinces of the northern Picts were separated by high and lofty mountains from the southern regions of that people; and that the southern Picts had their seats within that mountain range, alluding probably to the range of the so-called Grampians, which formed the south-western boundary of that division of the nation which throughout bore the name of Caledonians. This distinction, too, between the two branches of the nation must have been still further increased by the fact recorded by Bede, that the northern Picts were only converted to Christianity by the preaching of St. Columba in the year 565; while the southern Picts had long before embraced Christianity through the preaching of St. Ninian,[118] who, he tells us, built a church at ‘Candida Casa,’ or Whithern, in Galloway, which he dedicated to St. Martin of Tours. Ailred probably repeats a genuine tradition when he says in his Life of St. Ninian that he was building this church when he heard of the death of St. Martin, which happened in the year 397, so that the southern branch of the Pictish nation was at least nominally a Christian people, while the northern Picts remained pagan for a period of upwards of a century and a half. The Irish equivalent for the name ‘Picti’ was ‘Cruithnigh;’ and we find during this period a people under this name inhabiting a district in the north of Ireland, extending along its north-east coast from the river Newry, and from Carlingford Bay to Glenarm, and consisting of the county of Down and the south half of the county of Antrim. This district was termed ‘Uladh,’ and also ‘Dalaraidhe,’ Latinised ‘Dalaradia,’ and its inhabitants were the remains of a Pictish people believed to have once occupied the whole of Ulster.[119] South of the Firths of Forth and Clyde we find the Picts in two different localities. Gildas tells us that after the boundary of the province they occupied the northern and extreme part of the island as settlers up to the wall, and this probably refers to the districts afterwards comprised under the general name of ‘Lodonea,’ or Lothian, in its extended sense, comprising the counties of Berwick, Roxburgh, and the Lothians. In the north-western part of this region they appear to have remained till a comparatively late period, extending from the Carron to the Pentland hills, and known by the name of the plain of Manau, or Manann, while the name of Pentland, corrupted from Petland, or Pictland, has preserved a record of their occupation.