单项选择题

Robert Spring, a
century forger, was so good at his profession that he was able to make his living for 15 years by selling false signatures of famous Americans. Spring was born in England in 1813 and _51_ in Philadelphia in 1858 to open a bookstore. At first he prospered by selling his small but_52_collection of early U.S. autographs. Discovering his ability at copying handwriting, he began _53_ signatures of George Washington and Ben Franklin and writing them on the title pages of old books. To lesson the chance of detection, he sent his forgeries to England and Canada for sale and _54_. Forgers have a hard time selling their produces. A forger can’t approach a _55_ buyer must deal with people who don’t have much knowledge in the field. Forgers have many ways to make their work look real. For example, they buy old books to use the _56_ paper of the title page, and they can treat paper and ink with chemicals. In Spring’s time, _57_ after the Civil War, Britain was still fond of the Southern state, so Spring _58_ a respectable maiden lady known as Miss Fanny Jackson, the only daughter of General “Stonewall” Jackson. For several years Miss Fanny’s __59__ problems forced her to see a great number of letters and manuscripts belonging to her famous father. Spring had to work very hard to satisfy the demand. All this activity did not prevent Spring from dying in poverty, leaving sharp-eyed experts the difficult task of separating his forgeries from the __60__ .