SARAH (SALLY) MULLIS' birth father could have been BRYANT BRITT or his son HENYARD BRITT. Her birth mother could have been JANE MULLIS, daughter of DUKIL MULLIS.
BRYANT BRITT'S wife, Laurena, raised SALLY. BRYANT disappears after the 1860 US census. SALLY and TOM BLANKENSHIP are then found in Louisiana near the family of LAURENA and her children.(LAURENA had a SARAH BRITT of her own after my SALLY was born; ABT. 1857, before BRYANT disappears.) Later, HENYARD and his wife have a Sarah.
HENYARD and JANE would have been abt. 17 and 16 years old respectively in 1855.
I think that I have waited too late to solve this problem!