First may I thank you for responding to my query; very thoughtful of you. Although it is possible that the enumerator mistook "Hubbard" (which was my John Garlington's middle name) for "Herbert," I think it is unlikely since I pretty well have him pinned down in Attala County in 1850. Had you said the 1860 Calcasieu Parish LA census instead of the 1850, I would have said "yes," let's pursue this further, but I think it unlikely in this case.
Are you a Garlington researcher? If so, I would enjoy discussing this further with you, Dolores. It truly seems to be one of my several "brick walls."