The New York Public Library is closed today––it is a national holiday––but New Yorkers should be proud to hear that the main branch on 42nd St. and 5th Ave. has been entrusted with one of two surviving copies of the Declaration of Independence, written by Thomas Jefferson himself. The document is a handwritten duplicate of the document signed in Philadelphia 231 years ago, asserting the original thirteen colonies' indepedendence from England and starting the American......