In my research, one other source suggested for a Poage-Preston connection was proposed back in 2012 on Genealogy.com:
http://www.genealogy.com/forum/surnames/topics/poage/464/
The person who made the above post noted 4 records showing up stating Robert Poage married Elizabeth Preston. You can also search the database yourself, although I have only been able to find 3 records:
http://search.ancestry.com/search/db.aspx?dbid=7836
That being said, I think we have reason to be highly suspicious of records in this "U.S. and International Marriage Records, 1560-1900" collection. Here is the description of the collection on the Ancestry.com page:
"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. Compiled over thirty-four years by professional genealogist Bill Yates, these marriage records are unique because they were taken from a wide array of sources and stand to provide a great deal of information about entire families.
"Source materials for these marriage records include family group sheets, pedigree charts, family history articles, queries, letters, Bible records, wills, and manuscript genealogies. Researching with this unique database, you may be able to learn the full names of the bride and groom, their birth dates and places, the year and/or month they were married, and the marriage location. One of the most useful features of this collection is that once you find an ancestor in this database, you have the opportunity to quickly and easily obtain a great deal more information about that individual by contacting Yates Publishing (see next paragraph).
"The marriage records in this database were provided by Yates Publishing. Yates Publishing has been publishing genealogical books, periodicals, and quarterlies since 1972. In 1981, the founder, Bill Yates, began a service to provide and collect the family history information in family group sheets. Called the Family Group Sheet Exchange, this service has collected over 200,000 pages of family group sheets on paper and several hundred thousand more on disk. For more information or to order an original Family Group Sheet on the Family Group Sheet Exchange, please visit Yates Publishing."
As you can see, the only possible primary sources mentioned here are family bibles and wills, but other sources mentioned include family group sheets, pedigree charts, family history articles, queries, letters, and manuscript genealogies.
Below is a link to a thorough review of the collection in the case of another person unrelated to Robert Poage, simply showing how errors came to exist in this collection and how many of the "sources" are probably family group sheets of various kinds that were made in the 1900s, rather than actual primary sources. I have a feeling that the 3 Poage-Preston marriage "sources" are precisely these kinds of records, rather than actual primary sources from the time period (1700s).
That being said, if anyone is able to access these records, I'm sure many of us would be curious to see what they do show, so please do share what you find.
