My gosh, I can't believe I may have located someone at last who could likely fill in missing information I have sought for not a few years now!
With the date you have provided, 1838, I believe your Lemuel (James) Bruner could be a half brother of my paternal great-grandfather, James Driscoll Bruner, of Downing, Fabius Township, Schuyler County, (Northeast) Missouri; and I can help you with his mother's name and most probably her father's name,
. . . but there is a wealth of information on the Bruner name I will be happy to share with you.
It was shared that Lemuel left Northeast Missouri for Southwest Missouri/Taney and Christian Counties, I believe.A brother Harvey S(teele) Bruner journeyed there but returned, "It was too rocky (and hilly.)"
This is a quote from Harvey's youngest daughter, Mary Frances 'Mollie' Bruner Everly, since deceased, but one whom I had the sincere pleasure of meeting and visiting.She even said she and her elder siblings attended school there for a while.
Genealogy searches did lead me and a first cousin to Harrison, Arkansas, quite recently, but we could not be certain that Lemual may have traveled further south.
How fortuitous that your GenForum posting would be found by me today!That first cousin, Jim Bruner, of Downing, Missour, was just here in Denver, happy to contact me, prior to their continued vacationing in Colorado Springs and tourist stops thereabouts; and we were, in fact, nearly lamenting that Lemuel may never be found!
I'll try to reach you at your email address, but I know that that could have changed since a 1999 posting.