I keep my main family tree at Ancestry.com. They have a large database entitled US and International Marriages:
Source Information
Yates Publishing. U.S. and International Marriage Records, 1560-1900 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2004.
Original data: This unique collection of records was extracted from a variety of sources including family group sheets and electronic databases. Originally, the information was derived from an array of materials including pedigree charts, family history articles, querie.
Description
This database contains marriage record information for approximately 1,400,000 individuals from across all 50 United States and 32 different countries around the world between 1560 and 1900. These records, which include information on over 500 years of marriages, were extracted from family group sheets, electronic databases, biographies, wills, and other sources.
---- So, while I agreed to this merge I did not realize that after much work, Ralph Shelton and predecessors would get deleted from my tree and Mary would get left. I am not saying I am 100% convinced Mary Crispin is correct, but I and lots of others here and at Ancestry think she looks "good to go".