The cradle-land of our Angevin kings, the original county of Anjou, was a small territory in central Gaul, lying about the lower course of the river Loire and that of its affluent the Mayenne[233] or Maine. Its chief portion consisted of a wedge-shaped tract hemmed in between the right bank of the Loire, which bounded it on the south, and the streams of Loir, Sarthe and Mayenne, which flowed round it on the north and west; along its southern border stretched a belt of alluvial soil which in winter and in rainy seasons became a vast flood-drowned fen, swallowed up by the overflowing waters of the Loire; to the northward, the country consisted chiefly of level uplands broken here and there by patches of forest and tiny river-valleys, and rising in the west into a range of low hills, which again died down into a fringe of swampy meadow-land along the eastern bank of the Mayenne. A narrow strip of ground on the southern bank of the Loire, with a somewhat wider strip of hilly and wooded country beyond the Mayenne, completed the district to which its earliest known inhabitants, a Gallic tribe called Andes or Andegavi, have left their name. A few miles above the angle formed by the confluence of the two rivers, a lofty mass of black slate rock thrown out from the upland furnished a ready-made fortress important alike by its natural strength and by its geographical position, commanding the main lines of communication with central, northern and southern Gaul through the valleys of the Loire and its tributaries. Under the Roman conquerors of Gaul the place was called Juliomagus; the hill was crowned by a lofty citadel, and strengthened by a circuit of rampart walls; while from its crest a road struck eastward along Loire-side into the heart of central Gaul, another followed the westward course of the river to its junction with the sea, and others struck southward and northward into Aquitania and across the upland into the basin of the Seine. In the middle of the fourth century a Christian bishop, probably one of a band of mission-preachers who shared with the famous S. Martin of Tours the work of evangelizing central Gaul, laid beside the citadel of Juliomagus the foundations of a church, which in after-time grew into the cathedral of S. Maurice; and it is from the extent of the diocese over which his successors ruled that we learn the extent of the civil jurisdiction of Juliomagus. A later bishop, Albinus, left his name to the great abbey of S. Aubin, founded in Merovingian days on the slope of the hill just outside the city wall; a monastery dedicated to S. Sergius grew up to the north, in a low-lying marshy meadow by the river-side; while the place of the Roman prefects was taken by a succession of Frankish counts, the delegates first of the Merovingian kings of Neustria and then of the Karolingian emperors; and the Roman name of Juliomagus itself gave way to a native appellation cognate with that of the district of which it