The Cambridge Companion to the History of the Book Quotes

“Although reading is a private activity, leaving little trace on the historical record, its importance has led scholars to investigate the evidence that remains. Letters and diaries sometimes yield valuable insights into the response of actual readers. Another source for the responses of early-modern readers is the commonplace book and more generally the copying practice known as ‘commonplacing’. H. J. Jackson has demonstrated how scholars can use the notes made by readers who used the margins of a book to converse with the author and (as it happens) with posterity.”
― Leslie Howsam, The Cambridge Companion to the History of the Book