Solved!
Linda wrote the following account of how she eventually found her
information.
"I wanted to tell you about a little success story thanks to your web site. A
couple of years ago I submitted a picture of Maria Ursula USCHOLD (1821). I'd
been searching for her for 5 years at that time. In May of 2004, I received an
email from a genealogy researcher in Canada who had seen the picture and asked
me simply if she could have gone to Canada. In subsequent emails she told me
about a woman she had run across in St. Clements parish, Wellesley Township,
Ontario.
I quickly posted a note on the rootsweb section for Ontario, listing her
married name of DIEBOLD. Within a month I was contacted by her great
granddaughter, and we have a positive identification.
When you think about it, finding a woman from that time period is really
similar to finding a needle in a haystack. You can search, but you almost have
to wait until it sticks you. Marriage records were always listed under the
groom's name; naturalization and immigration records were not kept for women...
just a really difficult search.
Thank you for your help."