from All Cannings Cross, may suggest a consolidated socio-economic group in the region. However, by 600 BC, that appears to have broken down into differing sub-groups with their own pottery styles. Between c. 400 and 100 BC, there is evidence of emerging regional identities and a significant population increase. Ptolemy's Albion Claudius Ptolemy described Britain at the beginning of Roman rule but incorporated material from earlier sources. Although the name "Pretanic Isles" had been known since the voyage of Pytheas, and "Britannia" was in use by Strabo and Pliny, Ptolemy used the earlier "Albion", which is known to have been used as early as the Massaliote Periplus. Iron Age beliefs in Britain The Romans described a variety of deities worshipped by the people of Northwestern Europe. Barry Cunliffe perceives a division between one group of gods relating to masculinity, the sky and individual tribes and a second group of goddesses relating to associations with fertility, the earth and a universality that transcended tribal differences. Wells and springs had female, divine links exemplified by the goddess Sulis worshipped at Bath. In Tacitus's Agricola (2.21), he notes the similarity between both religious and ritual practices of the pre-Roman British and the Gauls. Religious practices often involving the ritual slaughter of animals or the deposition of metalwork, especially war booty. Weapons and horse trappings have been found in the bog at Llyn Cerrig Bach on Anglesey and are interpreted as votive offerings cast into a lake. Numerous weapons have also been recovered from rivers, especially the Thames but also the Trent and Tyne. Some buried hoards of jewellery are interpreted as gifts to the earth gods. Disused grain storage pits and the ends of ditches have also produced what appear to be deliberately-placed deposits, including a preference for burials of horses, dogs and ravens. The bodies were often mutilated, and some human finds at the bottom of pits, such as those found at Danebury, may have had a ritual aspect. Caesar's texts state that the priests of Britain were Druids, a religious elite with considerable holy and secular powers. Great Britain appears to have been the seat of the Druidic religion, and Tacitus's account of the later raid on Anglesey led by Suetonius Paulinus gives some indication of its nature. No archaeological evidence survives of Druidry, but a number of burials made with ritual trappings and found in Kent may suggest a religious