"Out of Louisiana and Mississippi, however, the term seems to have a more limited significance, and a Creole is understood to be a person that has mixed African and European blood in his veins — precisely the same description of person, indeed, with what is called a quadroon in New Orleans."

I think this makes my point perfectly. The people who think that "Creole" indicates a person with African blood are ignorant and uninformed outsiders. Note that the writer defines Creole as "a person that has mixed African and European blood in his veins," and says that this is "precisely the same" as a quadroon. Whereas, in fact, a quadroon is someone with 25% black blood, and 75% white. Not to be confused with mulattoes (50% black, 50% white), griffes (75% black), octaroons (12.5% black), marabons (62.5% black) and a host of other names, all with very specific definitions. Very few of these terms are still in use, but I am pointing them out just to show that the government in Richmond was not an authority on racial terminology in Louisiana.