Thanks Brian: when Jim first mentioned the song I tried to find it on Mudcat, and elsewhere. I didn't find much on Mudcat about the Arthur biography, which I am finding fascinating, either.

Vic: information duly noted. Thank you. I knew he did collecting later in life: I first encountered him via work done as a record company executive producer.

NB There is an amazing hedge in or just near Blairgowrie, isn't there?