"What?" she asked, apparently noticing Sazed's smile.

"Just amused at a proclivity of Mistborn, Lady Vin," he said. "Your kind has trouble simply sitting—it seems you always want to perch instead. That is what comes from having such an incredible sense of balance, I think."

Vin frowned, but passed over the comment. "Sazed," she said, "what was the Deepness?"

He laced his fingers before himself, regarding the young woman as he mused. "The Deepness, Lady Vin? That is a subject of much debate, I think. It was supposedly something great and powerful, though some scholars have dismissed the entire legend as a fabrication concocted by the Lord Ruler. There is some reason to believe this theory, I think, for the only real records of those times are the ones sanctioned by the Steel Ministry."

"But, the logbook mentions the Deepness," Vin said. "And so does that thing you're translating now."

"Indeed, Lady Vin," Sazed said. "But, even among those who assume the Deepness was real, there is a great deal of debate. Some hold to the Lord Ruler's official story, that the Deepness was a horrible, supernatural beast—a dark god, if you will. Others disagree with this extreme interpretation. They think the Deepness was more mundane—an army of some sort, perhaps invaders from another land. The Farmost Dominance, during pre-Ascension times, was apparently populated with several breeds of men who were quite primitive and warlike."

Vin was smiling. He looked at her questioningly, and she just shrugged. "I asked Elend this same question," she explained, "and I got barely a sentence-long response."

"His Majesty has different areas of scholarship; pre-Ascension history may be too stuffy a topic even for him. Besides, anyone who asks a Keeper about the past should be prepared for an extended conversation, I think."

"I'm not complaining," Vin said. "Continue."

"There isn't much more to say—or, rather, there is a great deal more to say, but I doubt much of it has relevance. Was the Deepness an army? Was it, perhaps, the first attack from koloss, as some theorize? That would explain much—most stories agree that the Lord Ruler gained some power to defeat the Deepness at the Well of Ascension. Perhaps he gained the support of the koloss, and then used them as his armies."

"Sazed," Vin said. "I don't think the Deepness was the koloss."

"Oh?"

"I think it was the mist."

"That theory has been proposed," Sazed said with a nod.

"It has?" Vin asked, sounding a bit disappointed.

"Of course, Lady Vin. During the thousand-year reign of the Final Empire, there are few possibilities that haven't been discussed, I think. The mist theory has been advanced before, but there are several large problems with it."

"Such as?"

"Well," Sazed said, "for one thing, the Lord Ruler is said to have defeated the Deepness. However, the mist is obviously still here. Also, if the Deepness was simply mist, why call it by such an obscure name? Of course, others point out that much of what we know or have heard of the Deepness comes from oral lore, and something very common can take on mystical properties when transferred verbally through generations. The 'Deepness' therefore could mean not just the mist, but the event of its coming or alteration.

"The larger problem with the mist theory, however, is one of malignance. If we trust the accounts—and we have little else to go on—the Deepness was terrible and destructive. The mist seems to display none of this danger."

"But it kills people now."

Sazed paused. "Yes, Lady Vin. It apparently does."

"And what if it did so before, but the Lord Ruler stopped it somehow? You yourself said that you think we did something—something that changed the mist—when we killed the Lord Ruler."

Sazed nodded. "The problems I have been investigating are quite terrible, to be certain. However, I do not see that they could be a threat on the same level as the Deepness. Certain people have been killed by the mists, but many are elderly or otherwise lacking in constitution. It leaves many people alone."

He paused, tapping his thumbs together. "But, I would be remiss if I didn't admit some merit to the suggestion, Lady Vin. Perhaps even a few deaths would be enough to cause a panic. The danger could have been exaggerated by retelling—and, perhaps the killings were more widespread before. I haven't been able to collect enough information to be certain of anything yet."

Vin didn't respond. Oh, dear, Sazed thought, sighing to himself. I've bored her. I really do need to be more careful, watching my vocabulary and my language. One would think that after all my travels among the skaa, I would have learned—

"Sazed?" Vin said, sounding thoughtful. "What if we're looking at it wrong? What if these random deaths in the mists aren't the problem at all?"

"What do you mean, Lady Vin?"

She sat quietly for a moment, one foot tapping back idly against the chair's back cushion. She finally looked up, meeting his eyes. "What would happen if the mists came during the day permanently?"

Sazed mused on that for a moment.

"There would be no light," Vin continued. "Plants would die, people would starve. There would be death. . .chaos."

"I suppose," Sazed said. "Perhaps that theory has merit."

"It's not a theory," Vin said, hopping down from her chair. "It's what happened."

"You're so certain, already?" Sazed asked with amusement.

Vin nodded curtly, joining him at the desk. "I'm right," she said with her characteristic bluntness. "I know it." She pulled something out of a trouser pocket, then drew over a stool to sit beside him. She unfolded the wrinkled sheet and flattened it on the desk.

"These are quotes from the logbook," Vin said. She pointed at a paragraph. "Here the Lord Ruler talks about how armies were useless against the Deepness. At first, I thought this meant that the armies hadn't been able to defeat it—but look at the wording. He says 'The swords of my armies are useless.' What's more useless than trying to swing a sword at mist?"

She pointed at another paragraph. "It left destruction in its wake, right? Countless thousands died because of it. But, he never says that the Deepness actually attacked them. He says that they 'died because of it.' Maybe we've just been looking at this the wrong way all along. Those people weren't crushed or eaten. They starved to death because their land was slowly being swallowed by the mists."

Sazed studied her paper. She seemed so certain. Did she know nothing of proper research techniques? Of questioning, of studying, of postulating and devising answers?

Of course she doesn't, Sazed chastised himself. She grew up on the streets—she doesn't use research techniques.

She just uses instinct. And she's usually right.

He smoothed the paper again, reading its passages. "Lady Vin? Did you write this yourself?"

She flushed. "Why is everybody so surprised about that?"

"It just doesn't seem in your nature, Lady Vin."

"You people have corrupted me," she said. "Look, there isn't a single comment on this sheet that contradicts the idea that the Deepness was mist."

"Not contradicting a point and proving it are different things, Lady Vin."

She waved indifferently. "I'm right, Sazed. I know I am."

"What about this point, then?" Sazed asked, pointing to a line. "The Hero implies that he can sense a sentience to the Deepness. The mist isn't alive."

"Well, it does swirl around someone using Allomancy."

"That isn't the same thing, I think," Sazed said. "He says that the Deepness was mad. . .destructively insane. Evil."

Vin paused. "There is something, Sazed," she admitted.

He frowned.

She pointed at another section of notes. "Do you recognize these paragraphs?" It isn't a shadow, the words read.