Jim Carroll,you tend to state your opinion as fact,it is your opinion that Eddie Lenihanes appearances is deliberately cultivated as part of his act,it is not fact.
The above three mentioned singers all of whom are [in Cyrils case were]good performers,learned some of their performance skills from Burl Ives,.
Burl Ives[IMO] like Phil Tanner managed to interpret Barbara Allen, well,.
yes differently, and yes I do prefer Tanners version,but Ives Version is still IMO good.Ives also brought a lot of people to the folk revival who contributed[the above mentioned three ]to Traditional music[it was CyrilTawney who first recorded April Morning.

I would suggest you cant remember the year[in praiseof ballads ]because it was a very long time ago[30 to 40 years],
If you are not acquainted with Brian Peters Singing you are ill informed,and not qualified to make informed comment on the folk revival as it is today.Dick Miles