A collection of texts found by this body of water includes the so-called “Passover Letter,” (-5[1])which provides (-5[2])instructions (10[1])for observing the Festival of Unleavened Bread. An ancient ruler from Thinis is thought to have conquered this body of water’s Naqada III archeological culture. A siltstone tablet depicts a ruler of this (10[1])river preparing to strike a kneeling captive with a mace. (10[1])A namesake ruler of this river is depicted with a dual crown on that tablet, (10[1])the Narmer Palette. An enormous cache of ancient Aramaic documents was discovered on this river’s Elephantine Island. The pith of one plant (10[1])that primarily grew along this river could be compressed to create mats and scrolls. For 10 points, the annual flooding of what river (10[1])allowed for the cultivation of papyrus in ancient Egypt? ■END■ (10[1])