In 1893 James Henderson married Emma Clark.
At the end of 1874 a person named Butler Clark married a Emma Pemberton (both black) in Wilkinson Co MS. I could not figure out if this is the right Emma. M (familysearch.org)
Kitty's maiden name was Roach according to her marriage record. But looking at the names of Emma's children in the 1900 census, Kitty is listed by age before the 2 Clark children, with the 2 Roach children born 1886 & 1892.
Maybe if you could obtain the death certificates of Kitty and some of her siblings, you might find the names of their fathers.
And in the 1910 Census they also stated that they had been married 20 years (2nd marriage for both). Ancestry.com - 1910 United States Federal Census Reason one only takes census info for the clues it might provide, not as absolute truth.
Dear Ms. Smith,
Thank you for posting your request on History Hub!
We suggest that you contact the appropriate State archives or historical society to request a search for the birth record of Kitty Fagin. Also, please review the FamilySearch Research wiki for United States Birth Records.
We hope this is helpful. Best of luck with your family research!