Varations on an Original Theme, op.36"Enigma" Variations on an original theme, op. 36 'Enigma' Variations on an original theme,Op.36"Enigma" Variations on an Original Theme,Op.36"Enigma" Variations on an Original Theme, Enigma; Variations on an original theme, op. 36 "enigma variations" Variations on an Original Theme,Op.15 Variaitions on an Original Theme ('Enigma') Variations on an original theme ("enigma"), op.36 Variations On An Original Theme, Op.15