▁reign ▁of ▁Sob ek h ote p ▁V , ▁who ▁was ▁followed ▁by ▁W ah ib re ▁I bia u , ▁then ▁Mer ne fer re ▁A i . ▁W ah ib re ▁I bia u ▁ruled ▁ten ▁years , ▁and ▁Mer ne fer re ▁A i ▁ruled ▁for ▁twenty ▁three ▁years , ▁the ▁longest ▁of ▁any ▁Th ir teenth ▁D ynast y ▁king , ▁but ▁neither ▁of ▁these ▁two ▁k ings ▁left ▁as ▁many ▁att est ations ▁as ▁either ▁Ne fer h ote p ▁or ▁Sob ek h ote p ▁IV . ▁Despite ▁this , ▁they ▁both ▁seem ▁to ▁have ▁held ▁at ▁least ▁parts ▁of ▁Lower ▁Egypt . ▁After ▁Mer ne fer re ▁A i , ▁however , ▁no ▁king ▁left ▁his ▁name ▁on ▁any ▁object ▁found ▁outside ▁the ▁south . ▁This ▁begins ▁the ▁final ▁portion ▁of ▁the ▁Th ir teenth ▁D ynast y , ▁when ▁southern ▁k ings ▁continue ▁to ▁reign ▁over ▁Upper ▁Egypt . ▁But ▁when ▁the ▁unity ▁of ▁Egypt ▁fully ▁dis integr ated , ▁the ▁Middle ▁Kingdom ▁gave ▁way ▁to ▁the ▁Second ▁Inter mediate ▁Period . ▁ ▁Administration ▁When ▁the ▁Ele vent h ▁D ynast y ▁reun ified ▁Egypt ▁it ▁had ▁to ▁create ▁a ▁central ized ▁administration ▁such ▁as ▁had ▁not ▁existed ▁in ▁Egypt ▁since ▁the ▁down fall ▁of ▁the ▁Old ▁Kingdom ▁government . ▁To ▁do ▁this , ▁it ▁appointed ▁people ▁to ▁positions ▁which ▁had ▁fallen ▁out ▁of ▁use ▁in ▁the ▁decent ral ized ▁First ▁Inter mediate ▁Period . ▁High est ▁among ▁these ▁was ▁the ▁viz ier . ▁The