Hirschhorn left the Jeep for his wife and drove the kids to school in the squareback, which turned out to be a Subaru. Keller stayed with the Subaru after Hirschhorn dropped off the kids, then let it go when Hirschhorn got on the interstate. Why follow the man to his office? Keller knew where the office was, and he didn’t need to fight commuter traffic to go have a look at it now.

He found another family restaurant and ordered orange juice and a western omelet with hash browns and a cup of coffee. The orange juice was supposed to be fresh-squeezed, but one sip told you it wasn’t. Keller thought about saying something, but what was the point?

“Bring your own catalog?”

“I use it as a checklist,” Keller explained. “It’s simpler than trying to carry around a lot of sheets of paper.”

“Some use a notebook.”

“I thought of that,” he said, “but I figured it would be simpler to make a notation in the catalog every time I buy a stamp. The downside is it’s heavy to carry around and it gets beat up.”

“At least you’ve only got the one volume. That the Scott Classic? What do you collect?”

“Worldwide before 1952.”

“That’s ambitious,” the man said. “Collecting the whole world.”

The man was around fifty, with thin arms and legs and narrow shoulders and an enormous belly. He sat in an armchair on wheels, and a pair of high-tech aluminum crutches propped against the wall suggested that he only got out of the chair when he had to. Keller had found him in the Yellow Pages and had had no trouble locating his shop, in a strip mall on the Bardstown Road. His name was Hy Schaffner, and his place of business was Hy’s Stamp Shoppe, and he was sure he could keep Keller busy looking at stamps. What countries would he like to start with?