Originally published in the New York Packet in March of 1788, Alexander Hamilton's Federalist 65 and 66 were compiled along with the rest of the "Federalist Papers" in April and May of that year and published in two volumes by J. and A. McLean as The Federalist: A Collection of Essays in Favour of the New Constitution. The McLeans only printed 500 copies, but even that proved to be far too many for the market. Today, it is one of the most sought after first editions in American political history because it so clearly lays out the original intent of the framers of the Constitution.
The world is paying particularly close attention to Federalist 65 and 66 right now because that is where Hamilton defined the power of the Senate in matters of impeachment. You can come in and see his original words in their first compiled form by asking for McGregor 56.