When was Federalist Papers created?

The first essays were published on October 5, 1787 (numbers 10 and 51) and the last was published on June 27, 1788 (number 63). All were signed by the pseudonym "Publius," despite having three different authors (Hamilton, Madison, Jay). They originally appeared in three New York newspapers, the Independent Journal, the New York Packet, and the Daily Advertiser.