Wordless servitors clad in long cerulean robes ghosted through the echoing silence of the library, some on wheels, and some on telescoping legs that allowed them to reach the higher shelves, while other, more specialised retrieval drones floated on individual grav-plates. Servo-skulls trailing long parchments and carrying quills in clicking bronze callipers floated through the air, the glowing red orbs of their eyes like drifting fireflies in the sepulchral gloom.
Uriel had spent a great deal of time within the Library of Ptolemy in his years of service to the Ultramarines. Here, he had learned the legacy of his Chapter and its heroes as well as the broader scope of Imperial history and politics. However, the majority of his time had been spent memorising the tenets of his primarch's greatest work, the Codex Astartes.
Such thoroughness was at the heart of Astartes training. Though bred and equipped for war, a Space Marine was not simply a thoughtless killing machine wrought from the bones of ancient science. His decades of training enabled him to become more than simply a warrior. Each Astartes embodied the finest qualities of humanity, courage, honour and a capacity to fight not simply because he was ordered to, but because he knew why.
Uriel's sandalled footsteps echoed on the floor, disturbing both the dust and the reverent silence that filled the library with a heavy quality all its own. Pasanius walked beside him, likewise stripped of his armour and dressed identically to Uriel in a chiton of deepest black that was secured around his waist by a belt of knotted rope.
These were the robes of the penitent, yet the knotted belt was that of an aspirant, signifying that their trials were almost at an end. The Apothecarion had decreed their bodies free from corruption, and the Chaplaincy had found their hearts to be pure.
The final decision as to whether their names would be entered once more into the honour rolls of the Ultramarines rested upon the shoulders of Marneus Calgar, and the Chapter Master's decision would be based on the word of his Chief Librarian.
The Arcanium was the heart of the library, its approaches guarded by silver-armoured warriors who bore long polearms with shimmering blades, and whose helmets were high hoods veined with psi-disruptive crystalline webs. None had challenged them as they approached, but Uriel was not surprised, for these guardians would already know of their purpose, and could divine any ill-intent.
The interior of the Arcanium was a twenty metre square cube with an arched doorway in each wall, softly lit by thick candles held aloft in iron sconces worked in the forms of eagles and lions rampant. Its walls were constructed from bare timbers, weathered and bleached, as though reclaimed from a distant shoreline, and the floor was made of dark slate. The character of the room was quite out of keeping with its surroundings, having the appearance of a far more ancient structure that had existed long before the arrival of the library.
A heavy table of dark wood filled the centre of the chamber. Upon this table were four enormous tomes, their spines a metre long and thick enough to enclose a book a third of a metre deep. Each book was secured to the table by a heavy chain of cold iron through the faded gold leaf edging of their leather bindings, and the pages were off-white vellum that had yellowed with the passage of millennia. Tightly wound script filled each page, each letter precisely formed and arranged in perfectly even lines of text.
Uriel took a deep breath at the sight of these books, letting the myriad aromas settle in the back of his throat and transport his mind back to the age of their creation. He tasted the tannic acid, ferrous sulphate and gum arabic of the ink, the warmth of the hide used in the vellum and the chalk used to prepare the surface to accept the ink. But most of all, his senses conjured the image of the singular individual that had penned these mighty tomes, a god amongst men, and a figure to whom uncounted billions owed their lives.
These works of genius had lived in Uriel's dreams for decades during his training, but until now, he had only been allowed within the presence of copies.
'Is that what I think it is?' began Pasanius.
'I think so,' said Uriel, stepping towards the books with an outstretched hand.
Both men stared at the enormous books, too lost in their reverence for the instructional words that had guided the Ultramarines for ten thousand years to notice that the door behind them had shut and another had opened.
'I wouldn't touch that if I were you,' said a resonant voice. 'It would be a shame if the Arcanium's defences killed you before I could pass my recommendation to the Chapter Master.'
Uriel snatched his hand away from the book, and looked up into the hooded eyes of the Chief Librarian of the Ultramarines, who stood on the other side of the table, though neither he nor Pasanius had been aware of his arrival.
Varro Tigurius was an imposing figure, though he stood no taller than would Uriel were he clad in his armour. Rather, it was the depth of knowledge and immense stature his rank and power conferred upon him that made Tigurius so vast and terrible.
Uriel felt a tremor of fear down his spine at the sight of the Librarian, his heavily ornamented armour bedecked with wax seals and carved script-work. Wards and sigils of unknown origin spiralled around his gauntlets and across every facet of his battle plate. A set of bronze keys hung on a thick chain around his neck, and his skull-topped staff of office seemed to glitter as though fashioned from corposant made solid.
Tigurius's eyes were infinitely deep pools, bright and glittering with wry humour, though only the Librarian ever knew the source of that amusement. His pale skin and sunken cheeks gave his features a sharp, angular edge uncommon amongst the ranks of the Astartes.
The Chief Librarian stepped towards them, and Uriel felt his skin crawl at the nearness of the mighty warrior. Though Tigurius had fought with courage and honour for the Ultramarines for hundreds of years, and had saved the warriors of the 4th Company on the desolate heaths of Boros, he was no brother as other Space Marines were brothers.
His powers and wealth of hidden knowledge ensured that he remained an outsider, even within a Chapter of warriors bound by oaths of brotherhood stronger than adamantium. To some, Tigurius was little better than a warlock, a wielder of powers more commonly ascribed to worshippers of unclean spirits or warp wyches, while to others, he was a warrior guided by the Emperor himself.
Tigurius's prescient warnings had saved the Ultramarines from destruction at the claws of hive fleet Behemoth, had predicted the approaching war fleet of Warmaster Nidar, and had sent Uriel and Pasanius to Medrengard.
As much as Uriel honoured the might, power and rank of Tigurius, he had been through too much, due to this warrior's visions, to ever truly like him.
'Centuries of wisdom are contained within these hallowed pages,' said Tigurius, circling the table, and turning a page of the nearest tome without touching it. 'Our beloved primarch wrote much of its earliest passages here as a boy. Did you know that?'
'No,' said Uriel, surprised that he did not, for every warrior of the Ultramarines studied the history of the Chapter's gene-father, memorising his life, his battles and his teachings as part of his intensive training on the road to becoming a Space Marine.
'Few do,' said Tigurius. 'It is a small part of the primarch's story, and not one I am keen to promulgate, for I enjoy the solitude of this place and do not wish it to become a lodestone for pilgrims. Could you imagine this place with thousands traipsing through it like the Temple of Correction?'
Uriel shook his head, and glanced over at Pasanius. His friend was similarly close-mouthed, the sergeant's innate understanding of when to speak and when to shut up allowing Uriel to do the talking.