Gavin and Iain Sutherland originally performed as a folk / rock duo in the field of British music in the early 1970s, and then from early 1973 until late 1977 joined with Quiver to record and tour as Sutherland Brothers & Quiver.
Leo Kottke have the song Arms of Mary on his Peculiaroso album from 1994. The song is played in Open G Tuning D B G D G D. And Leo Kottke uses an 6 string guitar in this version. On his other album Leo Kottke Live from 1995 Leo is playing Arms of Mary on a 12 string guitar tuned down 1-1/2 steps instead. And it is also about a minute longer on that album making it 4:08 min long.