203, [1] pp. Inspiration for 1941 film starring Humphrey Bogart. A treasure worth killing for. Sam Spade, a slightly shopworn private eye with his own solitary code of ethics. A perfumed grafter named Joel Cairo, a fat man name Gutman, and Brigid O'Shaughnessy, a beautiful and treacherous woman whose loyalties shift at the drop of a dime.