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