“And academics?” he asked. There was no sense in talking about gangs to Rosethorn. She had no interest in that life, having never lived it, and she worried when he ventured too close to his old ways. “They do spells with rocks?”

Rosethorn tapped her slate with her chalk. “Like the spells I taught you for use with jade and malachite. Stones are the best objects to hold and store power. Are you wondering about someone who can work magic over a stone, or use what’s in the stone?”

Briar shrugged and wrestled his boots off. Once he’d peeled away both footgear and stockings, he told her about the girl Evvy and what he’d seen.

Rosethorn put her slate aside. “You’d better hope there is an ambient stone mage in Chammur,” she remarked when he was done. “I know one lives in the amir’s palace. Well, they’d have to have at least one, wouldn’t they?”

Briar frowned. “I don’t understand.”

“Over half the city lives in those cliffs.” Rosethorn waved a hand toward the orange stone heights of Oldtown. “Most of their walls are on stone as well as made of it. Their cisterns are dug into stone. If you don’t keep a stone mage around to tell you when a stack of apartments is about to collapse, you’re just asking for trouble.”

Briar sat cross-legged, grimacing as tight muscles stretched. “But howcome I have to hope there’s a stone mage here? It’s no skin off my neb.”

“Why, not howcome, and off my nose,” she corrected absently. “We never explained the rules to you four, did we? About new mages?”

“What rules?” he demanded sharply. This was starting to sound too much like chores for his liking.

Rosethorn sighed. “If there is no mage about whose magic is on the same order as that of a newly found mage — that’s your friend Evvy —”

“I don’t even know her,” objected Briar.

Rosethorn continued, ignoring him. “— if there’s no mage of her craft available to instruct her, then it is the obligation of the mage who discovers her to teach her the basics. The sooner the better. If her magic hasn’t broken away from her before, just the fact that you saw it means it’s expanding outside whatever unconscious control she’s had until now. Sooner or later it will really break out. If she’s a stone mage, I can think of all kinds of things that can go wrong, right here.”

“I’m a kid,” Briar objected. “Fourteen isn’t old enough to marry, let alone teach!”

Rosethorn shook her head. “Doesn’t matter. You’re a mage and you found her. If there isn’t a local who understands her magic, you have to teach her to meditate, to control her magic, and some of the most basic spells. Academics, too. She’ll need to learn different kinds of rocks and their magical applications, astronomy, reading, writing, mathematics —”

“Not from me she won’t,” said Briar. “I couldn’t even teach our dog to walk on a leash, remember? You need some unexcitable person to be a teacher.”

“Wrong again. You either teach her or hand her over to another stone mage.” Rosethorn reached over and held Briar’s wrist. “Trust me, you do not want to know the penalties for leaving an untaught mage to shift for herself.”

“Who’s gonna work those penalties on me?” Briar demanded crossly. “They’d best bring their supper to do it. They’ll be working a while.”

Rosethorn let him go. “That would be the closest member of Winding Circle’s Initiate Council or the Magecouncil of the University at Lightsbridge. They set and enforce the laws for mages from the Endless Ocean in the west to the Heaven Mountains in Yanjing.”

“Then I’ll go. They can come find me,” Briar snapped. “I ain’t their errand boy.”

“The nearest member of both of those councils is me.”

Horrified, Briar met Rosethorn’s eyes. The affection she always had for him was there, but it mingled with iron purpose. He didn’t ask if she were exaggerating to make a point. He knew her. She would land on him with both feet if he didn’t listen. And she could. Four people in the world had the ability to make him sorry he had crossed them. She was at the top of that short list — his foster-sisters were the others, and they were inside his mind when the four of them were together. Rosethorn didn’t have to be. He’d known for three years that she was what their world called a great mage, but even before learning that, he’d felt the breadth and depth of her power. He also knew there were times he could tease her, and times he could not. This time, he could not.

Seeing that he understood her very well, Rosethorn picked up her slate again. “You’d better track down the amir’s stone mage,” she said mildly. “Sooner, rather than later. When do we eat?”

Briar sighed and padded downstairs to start supper. Afterward, while Rosethorn cleaned up, he’d go over to the Earth temple. One of their dedicates would know if there were stone mages who lived closer to the Street of Hares than the one in the amir’s palace. He’d also have to find a way to talk to the girl Evvy. She was a wary street rat, just as he’d been. She’d go back to Nahim Zineer’s — she’d never walk away from the few coppers he paid.

She’ll think since I saw her in the afternoon, I’ll come back in the afternoon, he reasoned as he set out food. So she’ll go there in the morning. Which means if I’m to talk to her, I’d best get there before she does. I’ll have to hide, or she’ll run off as soon as she sees me.