Dark Angels - Conspiracy Theories: Games Workshop has in recent years restricted the information about the Dark Angels to emphasise the mystery surrounding the Chapter. The fate of Lion El'Jonson had been purposefully left out of all texts since the 2nd Edition Codex: Angels of Death (a Dark Angels/Blood Angels "combo" codex; the first dedicated Codex for either Chapter) from the mid-1990s, and only re-emerged in the 2001 "Index Astartes" article published in White Dwarf magazine.While the Inner Circle of the Chapter knew of the existence of Luther's stasis cell beneath The Rock, there is another chamber at the very heart of The Rock that is unknown to all but the Watchers in the Dark and the Emperor Himself.This secret chamber contained the still-sleeping form of Lion El'Jonson until his awakenin during the Arks of Omen Campaign during the Era Indomitus. Similarly, information regarding the Chaos Space Marines character Cypher, rumoured to be foremost of the Fallen, is kept vague to further fuel players' imaginations.The novel Angels of Darkness, written by Games Workshop staff member and codex writer Gav Thorpe, provides an alternative account of the events that split the Chapter, and the primarchs' influence over their Space Marines.According to the novel, despite the layers of learning and civilisation El'Jonson acquired in later life, the time he spent in the forests of Caliban marked him permanently, and he remained a brooding, paranoid, and secretive man.El'Jonson's experience taught him that exposure invited predators, that darkness was as welcoming as it was dangerous. Intrigue, half-truths, and suspicion became second nature to each new Dark Angel. El'Jonson mistrusted the Terran-born Dark Angels above all others.While these men formed a minority within the Ist Legion, El'Jonson spent by far more time leading them than the Caliban-born Dark Angels. El'Jonson also systematically removed control from each company commander and held his Legion's reigns tightly. Each company posted to a warzone was shadowed by a younger company in secret to report on its warriors' loyalties to the primarch.When the Horus Heresy erupted, the Dark Angels were operating on the Eastern Fringe of the galaxy. In the interim, Warp storms cut Caliban off from reliable astrotelepathy, so that only garbled accounts of current events reached the planet. Some were true, some were half-true, some were outright fabrications.In their desperation, the elder Dark Angels tried to leave Caliban and confront Horus. They were prevented by their younger brethren in a battle that grounded the Space Marines' vessels and despoiled Caliban.When the Lion returned, his fleet was fired on for fear that he had sided with Horus, and that the victors' version of the uprising had already damned them in El'Jonson's eyes. El'Jonson immediately ordered a full-scale bombardment, and the destruction of Caliban soon followed.The canonicity of the novel is hotly debated. Although the Fallen Merir Astelan is a first-hand witness to events, it is unclear which of his claims are true, which are deliberate misinformation, and which are bias. The author, Gav Thorpe, has stated in an interview on Dysartes that the book is not an objective look at the events on Caliban, but a character study of one of the Fallen Angels.