▁Arch ae ological ▁evidence ▁indicates ▁that ▁the ▁Sel gov ae ▁lived ▁in ▁two ▁principal ▁settlement ▁types : ▁stone - built ▁h uts ▁and ▁so - called ▁" s co oped ▁en clos ures ", ▁some ▁of ▁which ▁were ▁abandoned ▁in ▁the ▁ 1 st ▁century ▁AD ▁while ▁others ▁were ▁established ▁in ▁the ▁ 2 nd ▁century ▁and ▁developed ▁into ▁mult iv all ate ▁structures . ▁They ▁had ▁possibly ▁lived ▁in ▁the ▁area ▁since ▁the ▁Bron ze ▁Age , ▁and ▁certainly ▁during ▁the ▁pre - R oman ▁Iron ▁Age . ▁The ▁pattern ▁of ▁for ts ▁subsequently ▁established ▁in ▁the ▁area ▁by ▁the ▁Rom ans ▁suggests ▁that ▁the ▁Sel gov ae ▁lived ▁in ▁a ▁number ▁of ▁distinct ▁communities ▁and ▁probably ▁had ▁some ▁degree ▁of ▁trib al ▁and ▁political ▁organisation , ▁perhaps ▁influenced ▁by ▁individuals ▁who ▁had ▁fled ▁the ▁Roman ▁advance ▁further ▁south . ▁They ▁are ▁thought ▁to ▁have ▁had ▁a ▁trib al ▁centre ▁at ▁E ild on ▁Hill ▁North ▁near ▁Mel rose . ▁They ▁built ▁a ▁significant ▁number ▁of ▁hill fort s , ▁more ▁so ▁than ▁their ▁neighb ours , ▁which ▁may ▁explain ▁why ▁the ▁Rom ans ▁target ed ▁them ▁before ▁the ▁relatively ▁less ▁organ ised ▁and ▁therefore ▁less ▁threaten ing ▁tribes ▁to ▁the ▁west ▁and ▁north . ▁ ▁In ▁his ▁account ▁of ▁the ▁campaign s ▁of ▁G na eus ▁Julius ▁Agr icola ▁( g overn or ▁ 7 8 ▁– ▁ 8 4 ), ▁T ac it us ▁says ▁that ▁after ▁a ▁combination ▁of ▁force ▁and ▁diplom acy ▁quiet ed ▁dis content ▁among ▁the