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 Fed (newspaper)
By 1990, "The Federalist Paper" was already feeling the pinch of low content. Issues from the era display an increasing disregard for layout and copy-editing (a charge often leveled at the paper regardless of the format), a decline in advertising from former stalwarts such as Coors and Kaplan, and an editorial board that drew almost exclusively conservative commentators. The board of 1992, after a fierce debate, recommitted itself to the "classically liberal" stance of the founders and began a charge towards diversity of opinions.