Historic Families of Kentucky by Thomas Marshall Green, Cincinnati, 
1889, reprinted Genealogical Publishing Co., Inc. 1959. pp. 60-61. 
[Fayette county].

Sallie, the second daughter of Colonel James McDowell, married Oliver 
Keene, of Fayette county; her son, Oliver Keene, Jr., married a daughter 
of the late Sidney Clay, of Bourbon county, and granddaughter of General 
Green Clay, of Madison, and his daughter is the wife of Colonel 
Shackleford, of Richmond. One of Sallie Keene's daughters married Dr. 
Churchill J. Blackburn, a prosperous physician and farmer of Scott 
county; another daughter married a Boswell, and removed with her family 
to Philadelphia.  The wife of Mr. Riggs, the Washington banker, an 
accomplished and beautiful woman, was her daughter.

McDowell Keene Clay Shackleford Blackburn Boswel Riggs
=
Bourbon-KY Madison-KY Scott-KY PA Washington_DC

http://www.rootsweb.com/~kygenweb/kybiog/fayette/mcdowell.s.txt