Lewis Grassic Gibbon, the pseudonym of James Leslie Mitchell, produced one of the most important realisations of the ideas of the Scottish Renaissance in his trilogy A Scots Quair (Sunset Song, 1932, Cloud Howe, 1933 and Grey Granite, 1934), which mixed different Scots dialects with the narrative voice.[11] Other works that investigated the working class included James Barke's (1905–58), Major Operation (1936) and The Land of the Leal (1939) and J. F. Hendry's (1912–86) Fernie Brae (1947).[11]