I am seeking information on the family of John H. Blair and Isabella McCune. John Blair died prior to the 1850 census; married Isabella on 17 Feb 1831 in Nicholas Co., KY. Isabella was born about 1799 in KY,daughter of Robert McCune and Jane Mathers; on the 1850 census she survived with three children: Martha J., b. July 1833 KY (who marr. Archibald A. Brown about 1860); John P., b. 1836; and Frances E., b. Feb 1836 or 1838.