Slavery Knows No Colour.
Salome Sally Mueller was a German girl sold into slavery in 1818 in New Orleans, to John Fitz Miller of St Martin's Parish. The slave owner owned a sugar cane farm. She and her supporters brought a suit in First District Court of Louisiana to fight for her freedom. The issue of being white and having white ancestry could not set her free and save her from the hardships of slavery. When she grew up, she ended being held as legal property of Louis Belmonti. The Fifth District Court ruled against Salome Mueller, but the following year in 1845, the State Supreme Court ruled in her favour. Its ruling in Miller v. Belmonti (1845) included this statement:
"That on the law of slavery in the case of a person visibly appearing to be a white man, or an Indian, the presumption is he is free, and it is necessary for his adversity to show that he is a slave."
In her slavery years, Salome got married to a Black man. After gaining her freedom, Miller petitioned to have her mixed-race children freed based on their having been born to a woman who was legally free. John F. Miller and his supporters continued to dispute her claim as a native European. At a new trial, known as Miller v. Miller (1849 La), John Miller and his team produced new witness testimony and additional documentation to try to prove that Sally Miller was part-black and legally born into slavery.
Sally Miller was unable to gain freedom for her three children, however. She was reported in the 1850s to have gone to settle in California.
George W Cable wrote a book about her, entitled Salome Mueller, A White Slave.
Another source is Wiki entry: http://en.wikipedia.org/wiki/Sally_Miller