Which sources did James Boswell use to write The Life of Samuel Johnson, LL.D.?

James Boswell utilized a variety of primary materials to construct The Life of Samuel Johnson, LL.D., relying on his own meticulous documentation and extensive research. His primary sources included:1

• Personal Journals: Throughout their 21-year friendship, Boswell kept detailed records of Samuel Johnson’s conversations using a self-invented system of shorthand. These journals were so integral that they were often lifted bodily into the biography, sometimes serving directly as the printer’s copy.23
• Correspondence and Papers: Boswell skillfully integrated Johnson’s personal letters and papers into the narrative to provide an authentic look at his subject’s life.1
• Interviews: He gathered significant information by conducting interviews with a large number of people who had known Johnson personally.1
• Direct Observation: Boswell relied on his own observations of Johnson’s behavior, often actively staging scenes or asking specific questions to prompt Johnson to make statements worth preserving.21

By interweaving these diverse materials, Boswell successfully captured the living texture of Johnson’s personality and daily life.1