The recordings of Charlie Murray on Greentrax were (I think) recorded by Hamish Henderson for the School of Scottish Studies in 1972 - this is referred to in the notes in the Kinross programme of that year:

Born in the Black Isle, brought up in Aberdeenshire, has worked on farms all his life in six counties from Easter Ross to East Lothian. He has been at Craigeassie near Forfar for nearly twenty years, His repertoire of songs has been picked up in bothies, at markets and in farm kitchens. He often gives a song at his local the Justinhaugh Hotel. Was recorded recently by the School of Scottish Studies, Edinburgh.

Peter Shepheard
www.springthyme.co.uk