As someone who also treasured the Warner Brothers album, I thought it might be appropriate to mention, for the sake of completeness, the trio performance of "Shenandoah" by Will Holt, Judy Collins and Lynn, from Oscar Brand's TV show circa 1963, which is on YouTube. Also, there are two tracks by Lynn on the LP, A supplement to The Life History of the United States, vol. 1 ("The Seeds of Love," and "Springfield Mountain"). Both great. I certainly would like to hear whatever is on the Irish tape some day, and see it made publicly available.
Best regards,
DMR