How I read

Mr. Elphinston talked of a new book that was much admired, and asked Dr. Johnson if he had read it. JOHNSON. ‘I have looked into it.’ ‘What, (said Elphinston,) have you not read it through? Johnson, offended at being so pressed, and so obliged to own his cursory mode of reading, answered tartly, ‘No, Sir, do you read books through?’

James Boswell, Life of Johnson, April 19, 1773 (in my 1924 Oxford University Press edition, vol. 1, p. 493)