The car had turned into a bleak, unlit street of small terraced houses. No traffic, no shops, no place where two outsiders might conceal themselves. Keller pulled to the curb and doused the headlamps. A hundred meters farther down the street, the Mercedes nosed into a drive. The lights of the car went dark. Four doors opened, four men climbed out.

“Chez Walsh?” asked Gabriel.

Keller nodded.

“Married?”

“Not anymore.”

“Girlfriend?”

“Could be.”

“What about a dog?”

“You have a problem with dogs?”

Gabriel didn’t answer. Instead, he watched the four men approach the house and disappear through the front door.

“What do we do now?” he asked.

“I suppose we could spend the next several days waiting for a better opportunity.”

“Or?”

“We take him now.”

“There are four of them and two of us.”

“One,” said Keller. “You’re not coming.”

“Why not?”

“Because the future chief of the Office can’t get mixed up in something like this. Besides,” Keller added, patting the bulge beneath his jacket, “we only have one gun.”

“Four against one,” said Gabriel after a moment. “Not very good odds.”

“Actually, given my history, I like my chances.”

“How do you intend to play it?”

“The same way we used to play it in Northern Ireland,” answered Keller. “Big boys’ games, big boys’ rules.”

Keller climbed out without another word and soundlessly closed the door. Gabriel swung a leg over the center console and slid behind the wheel. He flicked the wipers and glimpsed Keller walking along the street, hands in his coat pockets, shoulders tilted into the wind. He checked his BlackBerry. It was 8:27 p.m. in Dublin, 10:27 p.m. in Jerusalem. He thought of his beautiful young wife sitting alone in their apartment in Narkiss Street, and of his two unborn children resting comfortably in her womb. And here he was on a desolate street in south Dublin, a sentinel on yet another night watch, waiting for a friend to settle an old score. The rain hammered against the windscreen, the bleak street became a watery dreamscape. Gabriel flicked the wipers a second time and saw Keller pass through a sphere of yellow sodium light. And when he flicked the wipers a third time, Keller was gone.

The house was located at 48 Rossmore Road. It had a gray pebble-dash exterior, with a white-framed window on the ground floor and two more on the second. The narrow drive had space enough for a single car. Next to the drive was a gated walkway, and next to the walkway was a patch of grass bordered by a low hedgerow. It was respectable in every way, save for the man who lived there.