Hi,
I have some Barnes/Hembree (aka Hembrick) ancestors, amongst whom appeared a Sarah Forbush bc 1833 TN, and a James F. Forbush bc 1849, MO. They were in the 1850 Stoddard Co., MO census, and there is really no explanation as to why they were there. Could this be your Sarah Forbush/Fawbush/Forebush?
Leslie