The McClurgs of this family are buried at Benton Branch Cemetery, which is located 1 mile west of Windyville on MM to the first gravel road to the left; about four miles, across the river and on the left side beside the church.
Marion McClurg, b. 5 Aug 1869 - d. 15 Dec 1921, Son of Alex,is buried in Row 3, No. 25 grave. Grave 26 is an unmarker grave with a field stone marker. This grave ends Row 3.
As I know there are still related McClurgs living in Dallas County, MO, you may be able to get a contact through the Dallas County Historical Society, Box 594, Buffalo, MO 65622.
If Nellie Patterson had relations there, I can also check this cemetery listings for any of them, and from the Index, there were many Pattersons buried in these cemeteries of Dallas County Missouri.
I am related to the McClurgs of Dallas and Polk County Missouri.