1. In the Introduction to her edition of the novel (see the Appendix), Jennie Bourne Taylor draws attention to what she considers a parallel between the importance of a trance-like state in the opera and the state of delirium in which Valeria, the main character in the novel, finds herself as Miss Hoighty sings the aria (p. xviii). Yet in the opera, Amina is in anything but a trance when she sings the aria in Act 1.
2. See Lehmann, , Ancestors and Friends, 161, and Peters, The King of Inventors, 124, who note that Collins reserved second place for Sir Charles Hallé.
3. Wilkie Collins, 110. He does not, however, suggest a specific composition.