I have hit a brick wall with my genealogy search. I am looking for my great-great grandfather, Nelson Allen.He was born abut 1815 in Tennessee and died February 1872 in Bartlett, Tennessee.He married Amanda Greer in 1852 in Williamson County, Tennessee (Nashville area) and I assume (from 1860 census records) they moved to the Dyer County, TN area and then to Bartlett, TN (Shelby County).They had three confirmed children, Hugh Henry Allen, John Everett Allen and Sarah A.E. Allen. There was possibly a son of Nelson Allen from a previous relationship. I cannot find any information about Nelson's parents, etc. Any help appreciated.