Shelia, maybe, this will give you some more family to contact to see what they may know, if you do not already have this info..He had another daughter Millie Simpson born 3/11/1862 who married Lee (Levi) Hefley--4/19/1883 Barry Co, MO..

1880 Lawrence Co, MO Census Mt Vernon pg 569d living in the G T White household

Margaret SIMPSON housekeeper W Female W 53 TN NC SC
Millie SIMPSON housekeeper daughter S Female W 18 AR TN TN
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Millie Hefley and family are listed on the 1900 Barry Co, MO Census, and Milly is listed on the 1910 Barry Co, MO census widowed

Millie's MO death cert

http://www.sos.mo.gov/TIF2PDFConsumer/DispPDF.aspx?fTiff=/archives/DeptofHealth/Death/1917/1917_00014470.TIF&Fln=116763.pdf
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Gay