Excuse me, I believe in my reply to you earlier this morning, I mis-counted the number of un-named children you'll have to account for if you claim those 1830 and 1840 census records for David in Shelby county.
I said six, did I not? Seems it's only 4. But if you include the 1820 David in Giles, it's another 3, at least. And mostly gals, who are sometimes much more difficult to trace. Still. A number of lost kin to track down, yes?
Have you positively found Meredith B. after 1850 yet?
And are you sure the Meredith B. you have found belongs to your line?