Jennifer, in tracking census records for the children of James Forbis Jr & Phebe Bryan, I was trying to find Joel and Rachel after the 1850 Green Co KY census. I'm not sure what happened in the family but in 1860 in Barren Co KY, Dist. 1, living in HH of Wm. Wilcoxon were: Nathan Forbis, 28, Labr, KY Joel, 14, KY Adaline, 16, KY Mary E., 20, KY Wm. G, 3, KY Burwell, 11/12, KY
Nathan, young Joel, Adaline & Mary E Forbis are apparent siblings (based on 1850 census). It would appear that Mary E. somehow got out of order in this census along with her two sons and should have been listed as Wilcoxon instead of Forbis. I'm basing this on your info for the names of her children. I assume Joel and Rachel probably died between 1850-1860.