[168] I refer here to defensive works in which the whole of the summit of the hill is enclosed. These forts are usually of approximately oval shape, and follow the conformation of the hill. [169] As, for instance, at Risingham (Habitancum) on the road going north from the Wall into Scotland, and at Brough and Kirkby Thore on the road from York to Carlisle, which passes through upper Teesdale, and thence into the valley of the Eden. If to the sepulchral deposits and inhabited sites just described be added all the miscellaneous finds of objects accidentally lost or purposely concealed, it will be observed that there is hardly a single county throughout England, Wales, Scotland, and Ireland which cannot show one or two such Late-Celtic finds at least. Some counties are nevertheless richer than others,[170] as, for instance, Aberdeen, Forfar, Perth, Ayr, Kirkcudbright, and Dumfries, in Scotland; Antrim, Meath, and Roscommon, in Ireland; Denbighshire, in Wales; and Northumberland, Durham, Yorkshire, Derbyshire, Suffolk, Middlesex, Kent, Gloucestershire, Oxfordshire, Berks, Wilts, Dorset, Hants, and Somerset, in England. [170] _i.e._ have from four to ten localities where Late-Celtic finds have been made. EVIDENCE AS TO DATES OF FINDS OF OBJECTS OF THE EARLY IRON AGE IN GREAT BRITAIN The finds of objects of the Early Iron Age to which an approximate date can be assigned are as follows:— (1) Finds associated with burials of a particular kind. (2) Finds associated with objects of the Bronze Age. (3) Finds associated with objects of early Hallstatt type. (4) Finds associated with fibulæ or other objects of La Tène type. (5) Finds of objects associated with imported articles of Græco-Italic fabric. (6) Finds of objects associated with Ancient British coins. (7) Finds of objects, (_a_) on Romano-British inhabited or fortified sites, (_b_) associated with Roman coins, and (_c_) associated with articles of Roman manufacture. There are at least three different methods of burial characteristic of the Late-Celtic period in Great Britain. (1) Uncremated burials in excavated graves beneath barrows in which the deceased is generally found with his chariot and horses, as at Arras, Yorkshire. (2) Cremated burials in pits without any exterior mound, the ashes being contained in cinerary urns and the burials in groups, as at Aylesford, Kent. (3) Uncremated burials in graves formed of slabs of stone placed on edge, without any exterior mound, as at Birdlip, Gloucestershire. The first class of burials correspond with those at Berru and Gorge-Meillet, Department of the Marne, and probably belong to the same period as these earlier Gaulish interments which, from the associated Greek and Etruscan relics,[171] are known on the Continent to belong to the third, fourth, and fifth centuries B.C.[172]