Clamorgan, "Colored Aristocracy in St. Louis," further note. Publication date 1858.
This from the discussion of the University of Missouri reprint of 1999.
"When Cyprian Clamorgan wrote The Colored Aristocracy of St. Louis" in 1858, he described what it took to "make it" as an anomaly in that city. He recognized that, in St. Louis as in antebellum communities throughout the United States, to be free and of African descent meant that one did not fit into a society that assumed that black people were meant to be slaves and that only white people could know freedom. Yet Clamorgan observed that there existed in the Mound City "a certain circle: a peculiar class- the elite of the colored race" who attained their high status through "wealth, education or natural ability". And the greatest of these was wealth.

Julie Winch, who annotated the reprint of the Clamorgan book, "makes a valuable contribution to the study of free blacks."

Clqamorgan was a mulatto, a descendant of the voyageur and slave trader Jacques Clamorgan and one of his "Negro wives." A grandson of this man, Cyprian Clamorgan "sought to benefit financially from the sale of Jacque's land claims and the marketing of a literary challenge to the "white notion that black people were all alike because they were black.""
Colored Aristocracy

St. Louis of the 1850s was a boom city, a gateway to the west and to the Mississippi, with industry and monied families.
As a side note, some years ago I was at an auction of American coin silver, in which I was interested at the time. Work of St. Louis silversmiths of the 1850s was a feature, and I remember several pieces- tableware, pitchers, candlesticks- marked with the initials of one of the black societies of the time. A dealer friend if mine bought most of the pieces, for resale in the States.