water ▁arch ae ological ▁methods . ▁That ▁is ▁necessary ▁because ▁of ▁rising ▁ground ▁waters ▁in ▁what ▁was ▁the ▁N ub ian ▁region ▁of ▁An cient ▁Egypt . ▁These ▁tomb s ▁are ▁under ▁the ▁py ram ids ▁and ▁have ▁flo oded . ▁Initial ▁exc av ation ▁reports ▁of ▁his ▁tomb ▁indicate ▁that , ▁essentially , ▁it ▁may ▁be ▁und ist urbed ▁by ▁ro bb ers . ▁Ex pect ations ▁exist ▁that ▁artifact s ▁not ▁advers ely ▁affected ▁by ▁the ▁water , ▁will ▁be ▁found ▁so ▁more ▁will ▁be ▁known ▁about ▁N ast as en ▁from ▁what ▁is ▁discovered ▁along ▁with ▁tant al izing ▁evidence ▁already ▁found , ▁of ▁artifact s ▁mostly ▁dam aged ▁or ▁lost ▁due ▁to ▁the ▁action ▁of ▁the ▁water . ▁ ▁During ▁his ▁reign , ▁N ast as en ▁defeated ▁an ▁invasion ▁of ▁K ush ▁from ▁Upper ▁Egypt . ▁N ast as en ' s ▁monument ▁calls ▁the ▁leader ▁of ▁this ▁invasion ▁K amb as uten , ▁a ▁likely ▁local ▁variation ▁of ▁K hab bash . ▁K hab bash ▁was ▁a ▁local ▁r uler ▁of ▁Upper ▁Egypt ▁who ▁had ▁campaign ed ▁against ▁the ▁Pers ians ▁around ▁ 3 3 8 ▁BC . ▁His ▁invasion ▁of ▁K ush ▁was ▁a ▁failure , ▁and ▁N ast as en ▁claimed ▁to ▁have ▁taken ▁many ▁fine ▁boats ▁and ▁other ▁boot y ▁during ▁his ▁victory . ▁ ▁References ▁ ▁Liter ature ▁ ▁Las z lo ▁T ör ök , ▁in : ▁Font es ▁Historia e ▁N ub ior um , ▁Vol . ▁II , ▁Ber gen