Original meaning
Originalists of all stripes cite "The Federalist Papers". It is fairly tenuous to suggest that this represents a good source for the original "intent": after all, Alexander Hamilton, who wrote the majority of those essays, was absent for the greater part of the Philadelphia Convention, and John Jay did not attend it at all. However, James Madison, the principal framer of the Constitution also wrote a substantial amount of "The Federalist Papers". Also, to suggest Hamilton and Jay's absence from the convention implies their ignorance as to the Constitution's original meaning is demeaning to those two men and inaccurate. The collected anti-Federalist papers, of course, will be no use at all to a person searching for the original "intent" of the framers. However, as evidence of how a reasonable person at the time would have understood the words of the Constitution, "The Federalist Papers" and the anti-Federalist essays are evidence of direct relevance.
The Federalist Papers
The high demand for the essays led to their publication in a more permanent form. On January 1, 1788, the New York publishing firm J. & A. McLean announced that they would publish the first thirty-six essays as a bound volume; that volume was released on March 22, 1788, and was titled "The Federalist" Volume 1. New essays continued to appear in the newspapers; Federalist No. 77 was the last number to appear first in that form, on April 2. A second bound volume containing "Federalist" 37–77 and the yet to be published "Federalist" 78–85 was released on May 28. The last eight papers ("Federalist" 78–85) were republished in the New York newspapers between June 14 and August 16, 1788.