Harrison Staggs, Topeka Kansas (niece M.J. Warren)

I'd like to find the descendants of Harrison Staggs, who lived in the Topeka, Kansas area from at least 1870.In this census, his family is listed, along with a niece, Mary Jane Warren (age 4).They lived near James R. Warren, Mary Jane's father.Her mother(Luellen Staggs Warren) had died, and as I understand, James wasaway some, driving on the Sante Fe Trail.His older sons were at their farm.
In the 1880 census, Mary Jane is still living with the Harrison Staggs family.I know that she was still alive in 1882, when her father died, and in 1885.After that, I don't know what became of her.I'm wondering if any of Harrison Staggs's descendants know anything about Mary Jane.Did she ever marry?If so, what was her married name and who was her husband?Did she have children?I feel certain that the children of Harrison Staggs would have kept track of a girl who was raised as a sister.Please contact me if any of this rings a bell.Thanks so much!Sharon