The Undersized Shadow Summary

Spade collects his thoughts for a few moments after Cairo's departure and goes about his evening ritual of dinner and stopping at the cigar store. All the while, Spade is aware of a small man of about twenty years of age following him. Having found a theater ticket in Cairo's pocket during his search earlier in the day, Spade goes to the Geary Theatre to find Cairo.

When Cairo finally arrives, Spade points out the young man hiding in the shadows down the street. Cairo is unaware of the man and does not know him. Spade leaves Cairo, returns to his apartment to change clothes and hops a streetcar, noting that the young man is still trailing him. Spade arrives at Brigid's apartment and receives a warm reception from the young woman.

Spade casually mentions that he has met...