“Caveat lector”*…
* “Let the reader beware,” Latin phrase
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As we interrogate our sources, we might recall that it was on this date in 1789 that Representative (later, President) James Madison introduced nine amendments to the U.S. Constitution in the House of Representatives; subsequently, Madison added three more, ten of which (including 7 of his original nine) became the Bill of Rights.
Madison, often called “the Father of the Constitution,” created the amendments to appease anti-Federalists on the heels of the oftentimes bitter 1787–88 battle over ratification of the U.S. Constitution– in the drafting of which he had also played a central role.

Madison