Week 9.2 Paraphrasing

From the Biography of James Madison at http://www.whitehouse.gov/history/presidents/jm4.html:

Madison made a major contribution to the ratification of the Constitution by writing, with Alexander Hamilton and John Jay, the Federalist essays. In later years, when he was referred to as the "Father of the Constitution," Madison protested that the document was not "the off-spring of a single brain," but "the work of many heads and many hands."

According to the James Madison Biography at White House.gov some of the main additions to the Constitution were the Federalist essays that Madison wrote along with John Jay and Alexander Hamilton. (whitehouse.gov)