OK, Fionn, this is a lot later than four minutes, but I was away at a country fair all day yesterday.
Yes, there were good notes on the back of the original album. This was the first time I had heard of the Greenbriar Boys. Saw them a couple of years later in person, and they exceeded expectations. All three of them were superb musicians and obviously enjoyed what they did.
I think the album came out in 1960.