Obviously, I must find out whether any of these people have found any actual plaçage contracts. And be re-familiarize myself with their discussions now that I have been convinced that the practice is a myth.
Also, there is a 2011 book, Southscapes, that takes plaçage as real and cites references to it in Creole, not just Anglo-American literature. We have it in our library and I must read its footnotes.
#OccupyHE
Axé.
coldhearted scientist وداد 
Senior thesis with archival research that believes placage is real. https://kb.osu.edu/dspace/bitstream/handle/1811/32216/Quadroon_Balls1.pdf?sequence=1
UNO dissertation saying placage existed but was an actual domestic relationship, not “concubinage” — http://scholarworks.uno.edu/cgi/viewcontent.cgi?article=2268&context=td