Egyptian fraction have been called "Horus-Eye fractions" after a theory (now discredited) that they were based on the parts of the Eye of Horus symbol. They were used in the Middle Kingdom in conjunction with the later notation for Egyptian fractions to subdivide a hekat, the primary ancient Egyptian volume measure for grain, bread, and other small quantities of volume, as described in the Akhmim Wooden Tablet. If any remainder was left after expressing a quantity in Eye of Horus fractions of a hekat, the remainder was written using the usual Egyptian fraction notation as multiples of a "ro", a unit equal
Horus Heresy (fictional event) phases of the crusade, the Emperor promotes Horus Lupercal, his most trusted and versatile , to the position of Warmaster ( of Imperial armed forces), and overall leader of the Crusade. The Emperor then leaves the Crusade and returns to Terra, where he remains in relative isolation. He relegates administration of the Imperium to a civilian authority the and in an undertaking kept secret even from Horus, oversees efforts on his secretive . These actions, along with his father's refusal to reveal the nature of the Warp, test Horus' personal and mission-related resources, and exacerbate existing tensions among some of