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 Complete Anti-Federalist
The professor asserts that the name "AntiFederalists" was offensive and was used to color any opponents to a strong central government as unpatriotic, when in fact many Anti-Federalists (the hyphen denotes a different meaning) were patriots of the Revolutionary War against Britain. The Anti-Federalists, Storing reveals, felt that young men like Alexander Hamilton, who was the main author of "The Federalist Papers", were going against the ideals of the Revolution by substituting a potential Monarchy (a president) in place of the individual freedom assured by the Articles of Confederation. The Anti-Federalists demanded and got a promise of a Bill of Rights so that Ratification of the 1787 constitution in 1789 would not be stillborn (a political reality reluctantly recognized by the "father" of the US constitution: James Madison.) These collections are their unabridged arguments against a strong central government. Storing infers that there may be more pamphlets and writings in existence, but these were the only ones after nearly two decades of trying that he was able to tease out of private collections and the US government.