He edited James Scott Skinner's biggest collection of music, The Harp and Claymore Collection,[2] providing harmonies for Skinner's compositions,[3][4] and he was jointly responsible for compiling The Greig-Duncan Folk Song Collection, with the Rev J.B. Duncan (1848–1917). A selection from this collection of over 3,000 songs and tunes was published in 1925. Two volumes were published in 1981-1982, but the full collection, in eight volumes, was only finally published between 1981 and 2002.[5][6]
Donaldson, William (1984), Gavin Greig and Popular Fiction in Victorian Scotland, in Parker, Geoff (ed.), Cencrastus No. 18, Autumn 1984, pp. 20 - 22, ISSN0264-0856
Shuldham-Shaw, Patrick (1973), The Greig-Duncan Folk Song Manuscripts, in Maisels, Chic K. (ed.), Folk Song and the Folk Tradition, Festival issue of the New Edinburgh Review, August 73, pp. 3 - 5