Could either of those Duval/Duvall children have been born in 1850 Franks, St. Francis, Arkansas? There was a family Archibald Duval b. 1828 Illinois and wife Matilda b. 1829 Illinois, and baby name John Duval age '0' who had apparently just been born there in Franks, St. Francis, AR....all of whom were found in the 1850 Franks, St. Francis, Arkansas census...and then, I lose all of them after this census. Could one of those infants been this John Duval age '0' in the 1850 census?