HI Joy B: Joy Lehmann has been doing Oregon research for eons and eons. She has published several works on her excellent research. I believe that Dawson may be one of the many, many lines she has researched. I am unsure what "list" you may be looking at, however, if it is one the Society put out in past, I doubt that it is comprehensive. Not all researchers'lines are listed. Just some of those that supplied them. I believe that Rossana is on the right track in trying to contact Joy Lehmann. As Joy is subscribed to this list, I expect that Rossana may receive a response from Joy as soon as she is able to catch up with list mail. Happy Trails, Lauren