"You feel better now," he said roughly.

She thanked him and realized her eyes had adjusted to the fading light. She was surprised to find herself in the mountains, but these were not like the mountains of her home. They looked more like enormous piles of clay that soared high into the sky, taller than any she had seen before. They formed an almost complete ring around the small valley, and it was cool in their shade.

The tribesmen attended their horses, removing saddles and scraping sweat. They used large leather bags to water the horses. It took Catrin a moment to locate Benjin and the others, and she was relieved to see them unharmed. When she found Nat, he was limping toward her, leaning heavily on his staff. The ride had been rough on him as well.

As Catrin strode forward to meet him, no one moved to stop her. She walked past many tribesmen, who paid her little mind, seeming to be utterly consumed with tending to their mounts. The leaders, though, were gathered in a tight circle, obviously involved in another heated argument. When she reached Nat, he spoke out of the side of his mouth.

"We have much to discuss, but I can't speak freely," he said just above a whisper, and at the same moment, the tribal leaders separated. Vertook glared at Nat, and he moved away quickly.

"Calm and confident, li'l miss," Benjin whispered as the leaders approached. Catrin tried to appear composed, despite her anxiety.

Vertook swaggered up to them. "You, Catrin Volker, claim to be Herald of Istra, yes?"

"Yes," Catrin replied, wondering why they would ask her again.

"Prove it," he said simply.

Frozen in place, Catrin was terrified that trying to prove her powers and failing would mean their deaths. Even success would be fraught with danger.

"Do your thought-isolation meditation, now, " Benjin said to her even as Vertook's glare demanded his silence.

She wasn't certain she could do it, but she had no better ideas. She sat on the ground, cupped her hands, and closed her eyes. Her mind was hammered with intense thoughts too fleeting to grab on to. She focused on her frustration, squeezed her eyes shut, and ignored everything else.

The gasp from a tribesman distracted her, and she channeled it into annoyance, letting it feed her anger. She forced her mind to be consumed by a raging tirade that included a litany of irritants and annoyances. Each grievance was slammed into that thought. While some part of her cautioned against such anger in a meditative state, she slammed that thought inside too and let it feed the rest. She had no choice but to give this effort all she had.

When her energy reached its apex, Catrin could find only an angry haze of emotions. She raised her cupped hands slightly and threw them out wide. Concentrating on a second, more positive thought, she slammed her hands together, smashing the accumulated mass of negative energy with the positive charge. A blast of hot air rolled away from her, and booming echoes resounded.

Catrin opened her eyes to see what she had wrought. Benjin had sat down heavily, looking as if he had been assaulted. The others looked as if they had been struck by an enormous hand, so dumbstruck were their expressions.

The leaders once again convened in a circle, and the meeting almost instantly transformed into a brawl. Men quickly separated those who fought, and soon they were back to their heated argument. Several more scuffles erupted, and Catrin waited in silence for the madness to play itself out. No one said anything, lest the enraged group turn on them.

The fighting reached a crescendo, and it seemed all of the tribal leaders were involved. An elderly man advanced toward the writhing mass, shouting, waving his arms, and pointing at the men. Catrin did not know what he said, but his words seemed to demand order.

The brawlers removed their headgears and began to treat their wounds. Vertook's nose was bloodied, and he began to stuff small bits of cloth up his nose to stanch the bleeding. The old man lectured the leaders while they dressed their wounds, and it was plain that he shamed them. When the meeting reconvened, it did so in a much more subdued fashion. After what seemed an interminable time, they appeared to come to some conclusion, and they turned to face Catrin. Vertook stepped forward.

"We not believe you. Proof not enough," he said, having difficulty speaking with his nose plugged. Catrin heard his words and felt a cold, sinking feeling in her stomach. This was not going well at all, she thought, and Nat's stricken look confirmed her fear.

"One more chance; you show big power"-he waved his arms out wide-"or all die for trying to fool Arghast," Vertook said.

Catrin moved in front of each tribal leader and looked each one in the eyes. She measured them individually, and many became offended and enraged. One man had to be restrained by his tribesmen, but Catrin did not flinch. These men were threatening to kill her and her companions, and she had nothing to lose. She strode slowly back to the center of the group and addressed everyone in the valley.

"The tribes of Arghast have assaulted the Herald of Istra and her Guardians. They have asked for proof of the Herald's power, and they have found her demonstration insufficient. Now I will show the tribes of Arghast the true power of the Herald at their own peril. Power is a dangerous thing, and to see it is to be threatened by it. Once unleashed, fate will choose its targets. I have tried to spare you, but you leave me no choice; I must put us all at risk. You have made your decision. So be it."

Her words echoed and hung ominously over the valley. Not waiting for a response, she strode straight to Nat and looked him in the eye. His fear was showing.

"May I have your staff?"

"I can deny you nothing, Lady Catrin," he said loudly and bowed, presenting his staff. She accepted it, and it felt good in her hands, lighter than it appeared. The iron-shod tip somehow balanced the strange staff, and she could feel its strength, as if it had power of its own. The wood was smooth and highly polished but was not slippery or oily. She hefted it with a determined smile and turned to her companions.

"Guardians of the Herald, I call you to duty. Please assist me while I satisfy the curiosity of the mighty Arghast tribes."

Benjin winced as a few men reacted to her comment. He and her friends stood before her, awaiting her command. She was not surprised that Nat joined the group, but when Vertook stepped up, it gave her heart.

While the tribes had been fighting, Catrin had been scanning her surroundings for energy. The mountains revealed nothing to aid her-except a small clue: water. She guessed heavy rains fell there occasionally, and when they did, the runoff would have to go somewhere.

She looked at the sand, sensing the surface then delving beneath it. The sand was not very deep in the valley, and in some places it was only a couple of feet deep. Under the loose sand, a layer of compressed sand formed brittle sandstone. Not far beneath the sandstone, she sensed a layer of bedrock. When she cast her senses deeper, through the bedrock, she found water.

Her father had taught her about artesian basins, and she remembered her lessons well. This valley had all the criteria. Rainwater drained from the mountains and into the basin, where it fed an underground aquifer. Layers of rock that rose higher into the mountains also collected and held runoff. Water was trapped below an impermeable layer of bedrock and, subsequently, was under intense pressure.