From Peggy Seeger's letter to Living Tradition (https://www.folkmusic.net/htmfiles/edtxt39.htm)

The editor wants to know "Who are Jim Carroll and Pat Mackenzie?" They were members of the Critics Group for most of the life of that group. They were two of the most loyal, industrious and intelligent members by far. It is possible that they have inherited some of Ewan's intransigence and argumentative temperament (that's the way things go?) but there is no doubt that their work in the folksong world has been invaluable and dedicated. Most of the collectors who've done that have had a kind of tunnel vision, without which their work would not have been as productive. They stuck their necks out and their heads are getting chopped off. They are in good company.

Ewan's intransigence and argumentative temperament

Jim Carroll and Pat Mackenzie have inherited SOME of that. What does that say about MacColl?