根据短文理解，选择正确答案。
Henry Smith taught science at the City School. One day, he went to a bookstore and bought some books. Most of them were expensive. He left them in his Car in a quiet street. Then he went and bought some other things at other shops. At 6 o'clock he came back to the car. One window was open and the books were gone. Henry drove back to his home in Lake Street.
That night he wrote a letter to a newspaper. The next day he went to the police station.
On Friday people read an advertisement(广告) in the newspaper.
BOOKS WANTED
DO YOU HAVE ANY BOOKS THAT YOU NO LONGER WANTED? I BUY OLD AND MODERN BOOKS. OPEN ALL DAY ON SATURDAY. HENRY SMITH, 18 LAKE STREET.
Henry stayed at home on Saturday. His first visitor came at 8 o'clock.
Henry took him to the kitchen. At half past nine another man arrived. He had a bag under his arm.
"Mr. Smith?" the man asked.
"That's right," Henry said, "Can I help you?"
"I have some good books. You buy books, don't you?"
"Yes, bring them in. I'll have a look at them."
Soon the books were on the dining-table.
"Come in now, " Henry called out, "And bring the list."
A policeman came into the dining-room. He read the titles(书名) on the books and those on the list in his hand. They were the same.
"Come with me, Sir," the policeman said to the man.
