Knowledge and Ignorance

Sherlock Holmes's love of mental puzzles leads to his interest in the odd story Jabez Wilson tells him. His knowledge of crime and ability to reason allow him to discern that a serious motive must lie behind Wilson's singular experience with the bizarre Red-Headed League. Guided by this knowledge, and the observations he makes as a result, he stops a bank robbery and the further lawless career of a master criminal. Through Jabez Wilson, whom Holmes disdains as "not over-bright," readers learn that ignorance—especially when it is accompanied by greed—can make people unwitting accomplices to crime.

A keen intellect is not always a force for good, however. Only a brilliant mind like John Clay's could pinpoint Wilson as the ideal target and conceive of the Red-Headed League as the perfect scheme to divert Wilson's attention from his business while a tunnel is being dug...