The Aquafa salt mine is both a valuable imperial asset and the setting of a catastrophe that exposes the human cost of extracting its wealth. Van is imprisoned there as a slave, and later survives its destruction with Yuna; Hohsalle’s examination of the dead establishes that the disaster is linked to Black Wolf Fever. The mine’s walls and guarded approaches could not prevent the outbreak, but its corpses become crucial evidence in the search for ways to understand and treat the disease.

Setting and Strategic Value

The mine lies in a bowl-shaped valley surrounded by steep hills and mountains. Dense woodland covers the northern and western slopes, while the southern and eastern sides are more open but steep and rocky. An iron fence follows the forest’s edge and encloses the compound, supplementing the lookout towers. The road is muddy, and the difficult terrain away from it would slow an armed approach. These defenses reflect the mine’s importance: its salt is described as white gold, and the Aquafa mine is a major source of revenue.

The location’s geography also shapes escape. The mine shaft opens into a network of underground tunnels, and the slaves’ kitchen stands close enough to it for Van to retreat there with Yuna if danger returns. After the attack, Van considers the mine’s tunnels a possible route to safety, even as he recognizes that the valuable site will draw officials and soldiers once news spreads.

Forced Labor and Van’s Captivity

Van, leader and sole survivor of the Lone Antlers, is captured and enslaved at the mine. After two months of captivity, he is living under conditions in which the survival rate is at most three months. The slaves descend into the earth to fill baskets with rock salt, then carry the loads back to the surface throughout the day. At night they sleep shackled to iron pegs fixed deep in the rock, and the work begins again in the morning.

Van initially tries to kick loose the peg to which he is chained. It does not shift; weakened by meager rations and exhausting labor, he soon lacks the strength to keep trying. His confinement is not merely a locked door but a daily system that drains the body and narrows the prospect of escape. Against the memory of having killed many men in war, death in the mine becomes a renewed and immediate threat.

The Disaster and Its Investigation

After the mine’s catastrophe, Hohsalle and Makokan find the compound’s defenses intact but unable to avert disaster. Convicts in iron collars are made to load the corpses onto carts, while the soldiers watching them appear frightened. Hohsalle studies the bodies closely; Makokan, initially suspecting poisonous food, sees that the dead bear dog-bite marks and that every corpse has traces of a rash over the body. The evidence shifts the question from accidental poisoning to an illness associated with bites.

Hohsalle explains that Black Wolf Fever can pass through wolves and wild mountain dogs called ossam, and that fleas or ticks that have bitten infected animals or people can carry it as well. The absence of swarming insects around the bodies is reassuring, though not an assurance that risk has vanished: fleas are mostly dormant in frost but can survive through winter in warm places, including a dog’s body or a hearth. In this way the mine’s remains force the investigators to distinguish between visible danger and the less visible routes by which disease may spread.

From Corpses to Medical Inquiry

For Hohsalle and Milalle, the bodies are not only evidence of death but also a possible source of knowledge. They explain that study of the corpses could help identify the agents responsible for Mittsual, weaken them for a preparation that builds resistance, or reveal substances that suppress the illness and could lead to an anti-Mittsual medicine. They also consider whether victims may have developed antibodies that could inform a serum for people already infected. The corpses’ potential value does not erase the fact that the people died; it turns the site of mass death into the beginning of a difficult medical investigation.

Hohsalle describes the body’s defenses through the image of soldiers: different kinds protect the body, but they must learn to recognize which invading agents are harmful. A weakened disease agent can serve as a model of the enemy, training those defenses to respond. He credits this approach to his grandfather Limuelle, who discovered why people sometimes contract certain diseases only once and devised a way to introduce weakened agents. The mine’s outbreak thus links the immediate work of identifying a disease to a broader challenge to established medical teaching.

Shelter, Escape, and Contrasting Ideas of Disease

Van’s relationship to the mine changes after he escapes his chains and discovers Yuna. He spends the night in the slaves’ kitchen, choosing its sturdy structure and firebox as shelter and valuing its proximity to the shaft. He has already kicked in the neighboring building’s door, making it a poor option, and does not venture into the dark while the attacking beasts may still be nearby. Because salt shipments, food deliveries, and official inspections follow schedules he does not know, he judges that he must leave before dawn rather than risk being found when the mine resumes activity.

The mine’s disease investigation also exposes a contrast between medical traditions. Zolian priest-doctors, regarded as the fingers of the god, accept that an incurable patient should be left to divine care and given only medicines that ease death. Limuelle and Hohsalle’s success in treating Emperor Natalu’s wife challenged that doctrine and provoked opposition from the priest-doctors. Later, Mana declines to view the tiny organisms Hohsalle offers to show him: for Mana, identifying a disease’s cause is less important than observing the patient and removing the obstacles to a good life. Set beside these competing approaches, the mine is more than the place where an epidemic is discovered. It is where the dead prompt a search for new explanations, even as the meaning and purpose of medical knowledge remain contested.