“So then. Ye’ve got black powder, but it’s coarse stuff, with bits and pieces of uncrushed charcoal in it, bits o’ wood, bits o’ stone, rat dung, all manner o’ stuff. So ye dry that in cakes—we store those in the other shed—and then at your leisure, so to speak, ye crush and grind it—and that ye do out here in this shed, away from everything else, because it damn well will explode if ye happen to strike a spark whilst ye’re doing that—and if ye’ve made a cloud of it when the spark goes off, God help ye, ye’ll go up like a torch.”

The prospect didn’t seem to concern her.

“Then ye corn it—which means putting it through screens, to divvy it into different sizes. Finest corning is for pistols and rifles—that’s what ye’d want for hunting, mostly. The coarser sizes are for cannon, grenadoes, bombs, that class o’ thing.”

“I see.” It was a simple process, as explained—but judging from the state of Mrs. Patton’s apron and the singe marks on some of the boards in the shed, rather dangerous. She could probably manage to make enough powder for hunting, if they really had to, but dismissed the idea of trying to do it in large quantities.

“Well, then. What’s your price, for the sort of powder you’d use for hunting?”

“Hunting, is it?” Mrs. Patton had pale-blue eyes and gave Brianna a shrewd look out of them, then glanced at Mr. Shelby and her father, still conversing by the river. Why? she wondered. Does she think I need his permission?

“Well, my price is a dollar a pound. I sell for hard cash, and I don’t bargain.”

“Don’t you,” Bree said dryly. She reached into the pouch at her waist and came out with one of the thin gold slips that she’d sewn into her hems when she and the kids had come to find Roger. And she said a silent, absentminded prayer of thanks that they had found him, as she’d done a thousand times since.

“It’s not exactly cash, but it’s maybe hard enough?” she said, handing it over.

Mrs. Patton’s sandy eyebrows rose to the edge of her cap. She took the slip gingerly, felt its weight, and glanced sharply at Bree. To Brianna’s delight, she actually bit it, then looked critically at the tiny dent in the metal. It was stamped, but beyond the 14K and 1 oz., she didn’t think the markings would mean anything to Mrs. Patton, and apparently they didn’t.

“Done,” said the gunpowder mistress. “How many?”