Thanks to all those who contacted me. OK, it was only three people, but thanks just the same. I now know the following:

1. The duo was called Plain Folk and it really existed.

2. Their names were Ivan Stiles and Mercy Van Vlack. Mercy is the woman's correct name, not Marcy.

3. They may have been married, but then again maybe they weren't. In any event, Ivan and Mercy have gone their separate ways. Plain Folk broke up more than 10 years ago.

4. Ivan Stiles still works as a musician, mostly playing, teaching, and demonstrating the autoharp, on which he has become quite the maestro.

5. Mercy Van Vlack now works as a cartoonist and illustrator. Her last appearance as a musician was as a member of the chorus on the Ray Korona Band's Free Harbors CD a few years ago.