Adenda: not quite back to the 18th century?

A follow-up:A potential volunteer asked if he could participate although he hadn't yet gotten back to the 18th century.As it turned out, we RFF researchers knew his earliest known Rockwell, and were able to connect him to his proper line.Any other would-be volunteers, drop me a line and maybe you'll be lucky as well.Don't let that arbitrary cut-off date inhibit you from inquiring! --KR