It took me a few tries, but finally I found a listing in 1901. I thought, "Well obviously a well-meaning indexer just has a slip of the finger there!" Anyway, off went my check and request. On Friday in the mail I received a copy of that marriage record. Not only did I receive a nicely typed out "official" copy, but for my $3.00 (!!) I also received a photocopy of the page in the register showing the original information. Big as life it is 1901.
So, let's take another look inside the wedding booklet with the date of 1900:
It now appears that the last zero in the date might have started life as a one! It gives a somewhat different spin on the wedding in October. There was Mary, already 3 months pregnant, with her male cousin as witness at her wedding. Was the couple already planning their move to Ohio? Certainly by the time their son is born, six months later, they lived in Cleveland, Ohio. In Cleveland who's to know which year they actually DID get married!
I've looked as several other documents I have - Thomas's petition for citizenship where he give the 17-Oct-1900 date, the 1930 census that asks for age at first marriage. Both Tom and Mary give ages that would be consistent with a marriage in 1900. So, I guess I thought I had every reason to use that date - every reason but the best one...consulting a primary source!