<P> In the midst of the War of 1812, invading British Regulars led a Burning of Washington in August 1814, including the Capitol, and destroyed the Library of Congress and its collection of 3,000 volumes . These volumes had been left in the Senate wing of the Capitol . One of the only congressional volumes to have survived was a government account book of receipts and expenditures for the year 1810 . It was taken as a souvenir by a British Commander whose family later returned it to the United States government in 1940 . </P> <P> Within a month, former president Jefferson offered to sell his personal library as a replacement . In January 1815, Congress accepted Jefferson's offer, appropriating $23,950 to purchase his 6,487 books . Some members of the House of Representatives opposed the outright purchase, including Daniel Webster, a New Hampshire representative who wanted to return "all books of an atheistical, irreligious, and immoral tendency ." Jefferson had spent 50 years accumulating a wide variety of books in several languages and in many subjects, including philosophy, science, literature, architecture, law, religion, and mathematics . He had also collected books on topics not normally viewed as part of a legislative library, such as cookbooks . However, he believed all subjects had a place in the Library of Congress . He remarked: </P> <P> "I do not know that it contains any branch of science which Congress would wish to exclude from their collection; there is, in fact, no subject to which a Member of Congress may not have occasion to refer ." </P> <P> Jefferson's collection was unique in that it was a working collection of a scholar, not a gentleman's collection for display . Jefferson's original collection was organized into a scheme based on Francis Bacon's organization of knowledge . Specifically, he grouped his books into Memory, Reason, and Imagination, which broke down into 44 more subdivisions . The Library followed Jefferson's organization scheme until the late 19th century, when librarian Herbert Putnam began work on a more flexible Library of Congress Classification structure that now applies to more than 138 million items . In 1851, a fire destroyed two thirds of the Jefferson collection, with only 2,000 books remaining . In 2008, after working for ten years, the librarians at the Library of Congress had found replacements for all but 300 of the works that were in Jefferson's original collection . </P>

Does every book have a library of congress number