I believe John Madison Holland's mother-in-law Mary Lou (Vincent) Adams is the daughter of Nancy Belvidera Moore, who is 26 degrees from AJ.
Nancy and James Vincent's marriage: "Tennessee, Marriages, 1796-1950," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XDQ9-B5H : accessed 26 Oct 2014), J. M. Vincent and Nancy B. Moore, 14 Nov 1868; citing Gibson,Tennessee, reference ; FHL microfilm 1007465.
Nancy and James Vincent are the next listing after Nancy's father in the 1870 census: "United States Census, 1870," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MD8B-D51 : accessed 26 Oct 2014), Mary Vincent in household of James Vincent, Tennessee, United States; citing p. 19, family 141, NARA microfilm publication M593, FHL microfilm 000553027.