The first couple of paragraphs of the Constitution refer, in fact, to "free persons" and "all others" ~ and if you don't understand what that meant you really have no business issuing pronunciamentos on what is or is not relevant to the Bill of Rights.
Yes, Constitutionally slavery was a recognized institution, and legally enforceable, and therefore dependent on the powers granted to the government by the Constitution ~ which was voted into power by the people eligible to vote ~ none of whom was a slave.
I'm actually astounded that there might still be some folks around who are ignorant of the legal basis for slavery in America. Like, did you imagine it was just something that drifted in, and then drifted out, and had nothing whatsoever to do with our laws, customs and Constitution?
pronunciamentos. ah Si, muy bein..... LOL
Adios