Page 26
“Magnetite,” Del said. “Ground fine. It binds the free ions.”
He wrote it down. “Birch bark.”
“Ash. Same family. Opposite effect on cellular permeability.”
“Binding agent.”
“Chen’s formulation is proprietary. But silver nitrate responds to sodium thiosulfate. It precipitates the silver.”
Marcus looked up. His hazel eyes held hers across the worktable. “You’ve thought about this.”
“I’ve had two years to think about it,” Del said. “Every time I sealed a packet. Every time I scrubbed the mortar clean and told myself it was for protection.”
He nodded once, and the pen moved across the paper, nib scratching, glass clinking as he reached for another vial.
They worked through the dawn. Del measured components. Marcus transcribed. They tested combinations on slide after slide, each one placed under the scope, each one yielding the same result: degradation, thinning, the knife-sharp border between what lived and what died. The lamp burned lower. Marcus refilled it without being asked. The oil smelled of beeswax and something older.
Outside, the sky lightened from black to gray. Birds called from the trees beyond the parking area. The town of Ashton Grove woke by degrees: a truck engine starting somewhere on Harrow Lane, a door closing, a dog barking twice and falling silent.
Inside the carriage house, the scratch of the pen and the clink of glass went on. Del recited ingredients in a low, steady voice. Marcus wrote them down. They left the pack unmentioned, along with what would happen when the sun rose fully and the day began in earnest, with sick wolves in their beds and a town that had decided who to blame.
They had until then to find an answer. Maybe even less time.
Marcus capped his pen and set it beside the logbook. The page was dense with his handwriting, each line tight against the next.
“Again,” he said. “From the top.”
Del reached for the mortar. Her hands had stopped shaking.
Chapter 7
Del had slept through the day and come back after dark, the exhaustion of the night before still sitting behind her eyes. The lamp burned low on the worktable, its brass base warm under her fingers when she reached past it for the next vial. Midnight had come and gone. The clinic smelled of reagents and the wrong sweetness that rose from the infected blood when Marcus uncorked the storage jar. Glass slides lined the steel tabletop, each one marked with grease pencil, each one holding the evidence of something that hadn’t worked.
Del measured the magnetite on the brass scale. Her thumb rubbed the worn numbers between pours. Seven grams. She tipped it into the mortar and reached for the ash. The ratio was wrong. She knew it before she mixed it. The feeling sat in her chest, heavy and familiar after eight straight hours of wrong ratios.
Marcus drew the fresh sample. The siphon was brass and glass, about the size of a thick pen, with a plunger at one end and a hollow needle at the other. He worked it with the same steady, practiced care he brought to everything: no wasted motion. The needle went into the crook of his left arm. He depressed the plunger and the blood filled the glass barrel dark and fast. Vampire blood. His own. They’d run out of the stored infected samples two hours ago.
He capped the siphon and passed it to Del without speaking. She took it and uncapped the needle end. She let one drop fall onto the slide beside the mixed reagent. The blood hit the powder and the slide fizzed, and it was the wrong kind of fizz.
She placed the slide under the microscope. Marcus stood at her shoulder, close enough that the heat of him came through her damp sleeve. The cells swam into view at two hundred times. The magnetite had done something. A cloudy precipitate had formed along the border between the healthy cells and the degraded ones. The precipitate clung to the damaged membranes and pulled them together. The cells were clumping, not healing.
“It’s binding the free iron,” Del said. “But it’s pulling the damaged cells into clusters instead of reversing the breakdown.”
Marcus nodded. He moved back to the worktable and reached for the logbook. His pen scratched across the paper. Magnetite, seven grams. Ash, three-point-five. Result: precipitation, cellular aggregation, no reversal.
The cold coffee sat near Del’s right hand. Marcus had set it there an hour ago. The ceramic mug had a chip on the rim. She hadn’t touched it. Her sleeve was pushed past her elbow and damp at the wrist from wiping down slides between tests. The brass scale’s markings had worn thin in the center from years of Marcus’s thumb. Now it was her thumb rubbing the same spot.
She crossed out the magnetite formula in the margin of her notes. The same formula, crossed out three times in three different handwritings. Her first attempt had been too heavy and her second too light, and this one had been the right weight with the wrong effect.
“Again,” Marcus said.
Del measured the sodium thiosulfate. Five grams. She added it to a fresh mortar with two milliliters of distilled water. The mixture turned clear, then milky. She drew a fresh slide and marked it with the grease pencil as number nine.
Marcus passed her the siphon of fresh blood, his own. The drop hit the milky solution and the slide darkened from the center out. Under the scope, the cells at the edge of the field went still. The membrane degradation stopped. The hemoglobin stayed where it should. For thirty seconds, the slide held perfect. Then the darkness crept back in from the center, cell by cell, and the degradation resumed exactly where it had left off.
“It held.” Del’s voice cracked. She cleared her throat. “It held for thirty seconds.”
Marcus made the note. Sodium thiosulfate, five grams. Distilled water, two milliliters. Result: temporary arrest, thirty seconds, full relapse.
