*{{Endn|Note 1}}: While the offiial Primarch official primarch rediscovery order does not distinguish between the Second second and Eleventh Primarchseleventh, the novel [[Fulgrim: The Palatine Phoenix (Novel)|Fulgrim: The Palatine Phoenix]] confirms that the Second second was one of the first eight Primarchs primarchs rediscovered.{{Fn|7}}*{{Endn|Note 2}}: Officially, Horus was the first Primarch primarch rediscovered and Alpharius the last. According to Alpharius's own account, however, he was in fact the first Primarch primarch recovered by the Emperor and Horus the second, with Alpharius's existence being kept secret until his twin Omegon - the last undiscovered Primarch primarch - revealed himself (as 'Alpharius') to Horus and the Imperium.{{Fn|40}}