“Your price per square foot dropped from six forty-five to five ninety in two weeks,” said Holmes. “So I’m just wondering …” He stopped mid-sentence and wrinkled his nose. “What is thatsmell?”

Gretchen realized that she was now playing defense. “Well, the building used to be a bakery,” she said. “Maybe it’s …?”

“No,” Holmes said firmly, moving toward the other side of the room. “This is recent—and quite caustic.”

When he reached the large factory window on one wall of the space, he pushed the bottom half open and leaned out. “There was a tattoo parlor next door,” he said. It was a statement, not a question. Poe and Marple walked over to join Holmes at the window.

Gretchen was familiar with the view, and it wasn’t great. Her prospects were looking at the neighboring building, a one-story wreck with a corrugated door sealing the front. Plastic bins and trash littered a small paved area at the rear.

“I can check the property records,” said Gretchen, trying to glide past the unsavory subject. “I know it’s unoccupied at the moment.”

“PAHs,” said Holmes.

“Pardon?” said Gretchen.

“Polycyclic aromatic hydrocarbons. Used in black inks. They have a bit of a car-tire taint.”

“Funny,” said Gretchen. “I don’t smell a thing.”

“I’m hyperosmic,” said Holmes. “Blessing and a curse.”

Gretchen realized that she was quickly losing control of the tour. “Sorry, I don’t—”

“Unnaturally acute sense of smell,” said Holmes. “A genetic fluke.”

“Maybe we should check out the second floor?” Gretchen hinted, pointing toward a rusted metal staircase.

Poe gestured graciously. “Ladies first.” Gretchen took the lead, praying that the corroded treads would support the weight of four people. The second floor was as wide-open and empty as the first, except for a scattering of abandoned office furniture. “Take your time,” said Gretchen. “Any questions, just ask.”

As Marple ran a finger across a dusty bookshelf, Holmes dipped to one knee and scratched a floor plank with his fingernail. “Low-grade pine,” he mumbled. He pulled a small metal ball from his pocket,placed it on the floor, and watched it roll lazily toward the wall. “Two-point-five-centimeter slope,” he added with a frown.

Gretchen was trying to decide which of the three she should focus on. Holmes was clearly a fastidious nitpicker, maybe even obsessive. Marple seemed quiet and thoughtful. Poe was harder to read. Gretchen studied his face as he pulled open the top drawer of a creaking metal office filing cabinet and peeked in. He hadn’t smiled once since he arrived, but there was something darkly magnetic about him.

“Just so I’m clear,” Gretchen asked, realizing her three prospects might be shopping together, “are all of you …?”

“My God!” Poe exclaimed. “Murder!”

Gretchen froze as Poe pulled a yellowed newspaper clipping out of a file. His expression turned even more dour. “Someone was killed here,” he said.

“What?” said Holmes, suddenly energized.

“Really?” said Marple.

Poe waved the clipping. “Take a look.”

He smoothed the scrap of newsprint on top of the file. Gretchen’s gut was churning. The seller had warned her about this grim historical factoid.Dammit!She should have checked the drawers before the showing.

Marple ran her finger down the article and turned to Gretchen. “So it’s true?”

Gretchen cleared her throat. “I’d heard rumors,” she said carefully, “but—”

“Not a rumor,” snapped Holmes. “It’s right here in black and white.”

Gretchen stepped closer and looked over Poe’s shoulder. The paper was brittle, but the type was clear.DEATH IN A BAKERY, the headline read. And underneath, “Young Girl Slain Before Dawn.” The one-column story was accompanied by a photograph of a building.

The building they were in.

“Her throat was slit,” said Poe. “On the floor right below us. In 1954. She was just nineteen.”