Here's Virgie's grave:http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=bo...
Ionia is on the north Benton Co. line and Christian Cemetery is just across the line in Pettis Co.
Attached is the 1910 marriage certificate of Arthur and Virgie, and "Todd" was actually a post office in Morgan County:
Chas. A. Ziegel is listed in the 1889 Tax List of Union Township, SE Benton County but by 1900 the family was in Haw Creek Township, Morgan County. Bio of a Morgan Co. descendant states that Charles Ziegel was a mail carrier between Boylers Mill and Versailles.
Hastain was a Post Office in Union Township 1884-1951.
Here's a 1930 Benton Co. Plat Map, showing Hastain in Union Twp, and Ionia in north White Twp: http://digital.library.umsystem.edu/cgi/i/image/image-idx?so...
If you need Arthur Bockelman's ancestors, I can provide them back to 18th century in Germany.
There were also several other Ziegel marriages in Morgan County.