1. Readers have noticed Stevenson's fascination with duplicity. In what ways do various forms of duplicity play a large part in the novel?

2. David and Alan have been judged by some critics as two parts of a whole, rounded person. How are they shown to have opposite and also complementary qualities? Do these traits truly "fit" together?

3. What does the episode of David's stay on the island contribute to the story? What aspects of his personality does it emphasize?

4. What seems to be the Highlanders' chief motivation in maintaining their loyalties to a lost cause?

5. The visit to the cave of Cluny Macpherson is not integral to the plot, but it enriches the characterization of both David and Alan. How?

6. David tells himself several times, especially after the murder of Colin Campbell, that he would be better off escaping alone than with Alan, who is...