Well, I LIU'd by an alternate route:
Interestingly, although bartleby's thesausus provides a great many terms (by searching "quadroon") "HALF-BLOOD, half-breed, half-caste; mulatto; quarteron or quarteroon [rare], quintroon or quinteron, quadroon, octoroon, sambo or zambo; cafuzo; Eurasian; fustee or fustie [W. Ind.], mestee [W. Ind.], mestizo (fem. mestiza), griffe, ladino, marabou, sacatra [U.S.]; zebrule.", the bartleby's dictionary omits almost all of the less-familiar ones. It does define mestizo: A person of mixed racial ancestry, especially of mixed European and Native American ancestry
However, my Webster's defines "mestizo" specifically as mixed indian and european ancestry.
[Aside: Chrispus Attucks, the first colonial fatality in the American Revolution, is commonly identified as negro or mulatto. I believe however that orignal records show that he was in fact mestizo.]
