Fifteen of the 70 invited delegates to the Constitutional Convention did not attend, including Patrick Henry, Thomas Jefferson, Samuel Adams, John Adams, John Hancock and Richard Henry Lee. Rhode Island was the only one of the 13 original states that refused to send any delegates. Of the 55 delegates who did attend the Constitutional Convention, 39 signed the United States Constitution.
The Constitutional Convention began on May 14, 1787, in Philadelphia and lasted four months. Only 30 delegates stayed for the entire four-month period. The youngest delegate, Jonathan Dayton, was 26, while the oldest, Benjamin Franklin, was 81. The Constitution was signed on September 17, 1787. The delegate from Delaware, John Dickinson, had already left the city and had a proxy sign for him. Delegates Elbridge Gerry, Edmund Randolph and George Mason were unhappy with the document and refused to sign.