and a seriousness that made him seem older.

He looked first at Leo, then at the silver bottle, then at Leo’s mouth as the child moaned and pressed a hand against his stomach.

The boy stepped closer.

“Sir,” he said quietly, “where did that water come from?”

Robert looked up, stunned by the interruption.

“What?”

“The water in that bottle,” the boy said.

“Is it from old pipes?”

A few people in the room shifted awkwardly.

Robert’s instinct was irritation.

His son was doubled over, and some stranger’s child was asking questions.

But before he could speak sharply, the older woman with the cane touched the boy’s arm.

“Isaiah,” she murmured.

He did not move back.

“I’m sorry,” he said to Robert, though his voice held more conviction than apology.

“My brother got sick like that.

Kept clutching his stomach.

Couldn’t sleep.

Had headaches.

Doctors kept saying it was maybe stress, maybe his nerves, maybe food.

But it was the water in our old building.

Lead in the pipes.”

That last word seemed to alter the air in the room.

Just then the door at the end of the hall opened, and Dr.

Elena Ruiz stepped out.

She was in her forties, dark-haired, brisk, and tired in the way competent people often are.

She took in the scene at once.

“Bring him back,” she said.

Within seconds Leo was on an exam table.

Dr.

Ruiz listened to his abdomen, checked his eyes, his reflexes, his skin.

Then she paused and gently lifted his upper lip.

“How long has he had abdominal pain?” she asked.

“Since he was a baby,” Robert said.

“We’ve seen specialists in New York, Chicago, Boston, Houston.

Every test you can think of.”

“Maybe not every test,” Dr.

Ruiz said.

She looked toward Isaiah, who lingered uncertainly in the doorway until his grandmother pulled him back into the hall.

But the doctor had heard enough.

“Has anyone done an environmental history?” she asked.

Robert blinked.

“A what?”

“Has anyone asked where he spends most of his time, what kind of house he lives in, the age of the plumbing, recent renovations, imported ceramics, old paint, contaminated soil, water source?”

Robert opened his mouth, then shut it.

No one had.

They had asked about genes, symptoms, diet logs, bowel habits, stress, school, medications, family history, even whether Leo might be exaggerating pain because of unresolved grief after his mother’s death.

No one had asked about the house.

Dr.

Ruiz requested Leo’s previous records, which Robert’s assistant had sent ahead electronically.

She scrolled through years of reports with astonishing speed.

“Mild anemia repeated several times,” she said.

“Intermittent constipation.

Elevated irritability noted.

Poor appetite during episodes.

Slowed weight gain.

This should have prompted someone to think broader.”

Robert felt something ugly rise in his chest.

“Are you telling me eighteen doctors missed poisoning?”

“I am telling you,” Dr.

Ruiz said evenly, “that prestige sometimes narrows vision.

People look for rare zebras and miss the horse standing in the yard.”

She drew blood immediately and marked the order urgent.

Then she asked more questions.

How old was the house?

Built in 1912.

Which room was Leo in most often as an infant?

The east wing nursery.

Had that wing been renovated?

Carefully restored, Robert said.

Evelyn had loved original details.