Samuel Grady Keel and Cynthia Ray~Marriage
The 22 August 1850 date for the marriage of Samuel Grady Keel to Cynthia Ray is found in many sources. I will cite here the Roots Web Floyd County Kentucky website.
Kathy Hamilton has a page there listing the Pike County Kentucky Marriages for 1818 to 1875. I've contacted Kathy and asked for the actual sources and will publish those here when I have them.
In the meantime, you may access Kathy's list of those marriages Here