Magoffin Co., KY Cem. Vol. 2 pg 30 lists Elizabeth Crace mar. to Henry Jackson Conley who had a son, H. C. Conley in 1866 - so this must be her. She is the only Crace who fits. (Sv-1520)
1850 Pike Co., KY Census (Ancestry.com): Campbell Crase, aged 36, with wife, Mahala (32) and kids: James (15); Peter (13); Elizabeth (11); Nehemiah (9); Drucilla (7); Siney M. (5) and Noah (1).
Not listed with family on 1860 Magoffin co., KY census - so she had married or died. (SV-404 pg 729)