¹⁴ George Augustus Sala, one of Dickens’s protégés as a young journalist on Household Words, reported that ‘It was one of Mr. Dickens’s maxims that a given amount of mental exertion should be counteracted by a commensurate amount of bodily fatigue’; Dickens: Interviews and Recollections, ed. Philip Collins, 2 vols. (London: Macmillan, 1981), ii. 199.

¹⁵ Letters, iv. 3.

¹⁶ Letters, iii. 461.