Did Jefferson identify them in the Declaration of Independence? Or are they only the Rights delineated in COTUS?
"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness"
What other Rights might be among the three noted in this seminal document?
What Rights can we infer from the 9th Amendment?
Can Rights be abridged by "The People"?
No, rights cannot be abridged by the people.
Our rights are inalienable, they can be neither taken nor bestowed by any government, constitution, or man.
Although inalienable, or rights are not absolute, they are subject to reasonable restrictions by government reflecting the will of the people, consistent with the Constitution and its case law.
And when the people err and enact measures repugnant to the Constitution, those so disadvantaged are at liberty to seek relief in the Federal courts, where measures inconsistent with Constitutional jurisprudence are invalidated.
As for the Ninth Amendment:
''The language and history of the Ninth Amendment reveal that the Framers of the Constitution believed that there are additional fundamental rights, protected from governmental infringement, which exist alongside those fundamental rights specifically mentioned in the first eight constitutional amendments. . . . To hold that a right so basic and fundamental and so deep-rooted in our society as the right of privacy in marriage may be infringed because that right is not guaranteed in so many words by the first eight amendments to the Constitution is to ignore the Ninth Amendment and to give it no effect whatsoever. Moreover, a judicial construction that this fundamental right is not protected by the Constitution because it is not mentioned in explicit terms by one of the first eight amendments or elsewhere in the Constitution would violate the Ninth Amendment. . . . Nor do I mean to state that the Ninth Amendment constitutes an independent source of right protected from infringement by either the States or the Federal Government. Rather, the Ninth Amendment shows a belief of the Constitution's authors that fundamental rights exist that are not expressly enumerated in the first eight amendments and an intent that the list of rights included there not be deemed exhaustive.''
Ninth Amendment - U.S. Constitution - FindLaw
This is why the Constitution exists solely in the context of its case law, as determined by the Supreme Court, authorized by the doctrine of judicial review and Articles III and VI - “but that's not in the Constitution” is a failed and ignorant 'argument.'