First, the published flawed data:
From Morton's History of Highland Co (not complete nor entirely correct):
I have never seen evidence of Jehu's existence, nor primary evidence that John's wife was a Pickens. Several children are missing from this list.
24600Married Mary (Pickens) Callahan, widow of Wm Callahan. [Cleek, p.96] No marriage bond for this John in Bath Co and Mary doesn't match wife's name of Rachel in 1850 census. Cleek may be wrong, or John may have married twice. Elsewhere, Cleek has a John Givens married to Rachel Pickens, so perhaps this John's wife really is a Pickens. If she's his first wife, they were married before about 1813.
William CALLAHAN and Mary PICKENS were married, 3 Feb. 1812, at Pendleton Co., Virginia, by Otho WADE. [Pendleton Co marriages, from Bird page vol 5 on Bath Co page)
24600
Spouses
Memo1791?
Census1840, Bath County, VA25037
Residence1848, Highland County, VA25047
MemoHouseholders on Map of County Surveyor, Cowpasture
Memoage 77 yrs
Research
1830 Bath Co VA, Pg 189, Gwin, John C. (File:Anc Plus Gum 10/11/2002)
1850(85of92) Fam 598 Dwg 598
22164 John Gwin 64 M, B: Bath & Rachael 60 F, Sarah 35 F, Polly 33F, Hamilton 30 M, Margaret 25? F, Adison W. 5 M