Yes, this is the same Grigsby line that I am researching! :-) My line from John W. Grigsby is:
John W. Grigsby --> Minnie Bell Grigsby --> Lilbern Harper Odell --> Father (living) --> Me
So John W. Grigsby is my great-great grandfather on my Dad's side. I have a death certificate for Minnie Grigsby that show's her Mom's maiden name as Mary Pelgrim. However, I have hit a brick wall when trying to find any more information out about Mary Pelgrim. The name Pelgrim could very well be misspelled and actually be Pelgrim, Pilgrim, Pellom, Pellum. As for John W. Grigsby, having viewed several censuses and determined he was born in Georgia in 1846. His family moved to the Tennessee area in the 1850s and 1860s. He married Mary in Missouri, May 30 1869. They lived a short time in Missouri, returned to Tennessee, then according to 1900 census back in Jasper, MO. According to 1910 census, John W. Grigsby was living in Marchall OK. After that, not sure what happened to him or where he died or is buried. I do know that all of John W. Grigsby's children were living in Pontotoc County, Midland, OK (near Ada, OK) by 1920 (according to 1920 census) and all of John W. Grigsby's grandchildren were attending Lightning Ridge School in Midland, OK. Here is a link to the school census taken in 1920: http://www.rootsweb.ancestry.com/~okpontgs/lrscensus.html?cj...
I am sending all the above to your personal e-mail as well. If you have any more information, let me know! Thanks so much for posting! :-)