Sarah Mariah Farnham
The inscription on her gravestone in Arkansas confirms her birth and death dates and shows her name as "Sarah Farnham Bell."
Her death date is also confirmed by her death certificate, which appears with her record on FamilySearch. https://www.familysearch.org/photos/artifacts/91322376?p=24953971&returnLabel=Sarah%20Mariah%20Farnham%20(KNQ4-GCG)&returnUrl=https%3A%2F%2Fwww.familysearch.org%2Ftree%2Fperson%2Fmemories%2FKNQ4-GCG