Vast underground stone library with towering shelves carved into cave walls, featuring an ancient Roman-style cataloging system with scrolls transitioning into modern filing boxes as the shelves extend deeper into the cavern. In the foreground, a weathered wooden desk holds a brass hourglass with sand frozen mid-fall, beside carefully labeled specimen jars containing glowing data fragments in various states of decay - some vibrant and luminous, others faded and crystallizing. Warm amber torchlight illuminates the nearest sections while distant chambers fade into cool blue shadows, suggesting layers of time and relevance. Dust motes float in shafts of light from an unseen opening above. Vintage illustration style with cross-hatching details, muted sepia and indigo color palette, reminiscent of 19th-century scientific expedition journals and architectural etchings.