It has been great to follow this thread. I bought one of the ICFG lps on Elektra in the US in 1970 and was very impressed with every track, and sought out what else I could find as imports. When I had a folk music radio program in VA for 19 months 1998-99, I played something from the ICFG almost every week.
An interview I conducted with George Grove (Kingston Trio since 1976) in 1999 is available online at www.kingstontrioplace.com under "Read, Look and Listen". In this, you can hear George's reaction to hearing the ICFG for the first time, as I played "My Johnny Lad" and "We're Nae Awa to Bide Awa", citing them as obvious sources for the KT songs "Genny Glenn" and "Stay Awhile".
It was also my pleasure at that time to interview Frank Hamilton (of this board), but unfortunately I did not capture the interview on tape. It was a delight to be able to introduce him to the ICFG also.