I was about to cross-post some information on my Dale clan in Harrison Co., MO, and the first connection I was going to was SARAH E. ALLEN, dau of William Allen and Mary Copeland.Info I have is from 1888 History of Harrison and Mercer Co., MO, census records, and Harrison Co., MO, vital records which indicate that Sarah was b. 17 May 1809 in Overton Co., TN.Sometime in the early 1830's, she married James Alfred Dale (which connected her to one Dale clan I'm trying to tie to my own...but that's another story).J.A. & Sarah E. (Allen) Dale had five children in TN from 1834-1840 before relocating to MO in the early 1840s.Please see my recently posted descednancy of James A. & Sarah Dale on the Dale family GenForum (also on the Harrison Co., MO, forum).
Unfortunately, I have no information relevant to William Allen's parents.I'll watch the Allen forum for further responses to your inquiry.