The primary intertextaul aspect is the modelling of the text on Robert Louis Stevenson's 'The Strange Case of Dr Jekyll and Mr Hyde'. Stevenson's novel looks at the duality of man and the issues surrounding that theme. In Spark's novel we have the duality of both Jean Brodie and Sandy Stranger: both Brodie and Stranger second lives through their imaginary constructions, and indeed they could be seen to be doubles in that they have many characteristics in common. Another linked aspect is Brodie's use of the lives and works of the poets Robert Burns, John Keats and Wilfred Owen in order to construct a seemingly idealised picture of her 'one great love' Hugh Carruthers. Finally, the imaginative world of Sandy Stranger and her writings could also be said to have some intertextual power too.