▁In ▁the ▁ 2 0 0 9 ▁census ▁the ▁commune ▁had ▁a ▁population ▁of ▁ 4 7 , 8 7 6 . ▁The ▁town ▁of ▁D ior o ▁is ▁located ▁ 5 7   km ▁n ortheast ▁of ▁S ég ou ▁on ▁the ▁bank ▁of ▁the ▁river . ▁ ▁References ▁ ▁External ▁links ▁. ▁ ▁Category : Pop ulated ▁places ▁in ▁S ég ou ▁Region ▁Category : Comm unes ▁of ▁M ali <0x0A> </s> ▁The ▁Ven us ▁Th row ▁is ▁a ▁historical ▁novel ▁by ▁American ▁author ▁Steven ▁S aylor , ▁first ▁published ▁by ▁St . ▁Martin ' s ▁Press ▁in ▁ 1 9 9 5 . ▁It ▁is ▁the ▁fourth ▁book ▁in ▁his ▁Roma ▁Sub ▁Rosa ▁series ▁of ▁mystery ▁nov els ▁set ▁in ▁the ▁final ▁dec ades ▁of ▁the ▁Roman ▁Republic . ▁The ▁main ▁character ▁is ▁the ▁Roman ▁sle uth ▁G ord ian us ▁the ▁F inder . ▁ ▁Plot ▁summary ▁The ▁year ▁is ▁ 5 6 ▁BC , ▁and ▁G ord ian us ▁is ▁visited ▁by ▁his ▁old ▁friend ▁and ▁teacher ▁D io , ▁a ▁diplom at ▁who ▁leads ▁an ▁emb ass y ▁on ▁beh alf ▁of ▁the ▁citizens ▁of ▁Egypt , ▁who ▁want ▁to ▁make ▁a ▁compla int ▁about ▁their ▁king ▁P to le my ▁XII ▁to ▁the ▁sen ate ▁of ▁Rome . ▁D io ▁is ▁afraid ▁that ▁he ▁will ▁be ▁murder ed ▁by ▁the ▁king ' s ▁agents , ▁like ▁other ▁en vo ys ▁before ▁him . ▁When ▁he ▁is ▁poison ed ▁shortly ▁after , ▁G ord ian us ▁attempts