Dr John Polidori, Byron's secretary, to John Murray, 10 July 1816: 'Since it has given you hopes of entering well into the literary world next winter, that "Childe Harold" has got another canto [...] you will be more pleased to hear of another poem of 400 lines called "The Castle of Chillon" [sic]; the feelings of a third of three brothers in prison on the banks of the Geneva Lake. I think it very beautiful, containing more of his tender than his sombre poetry.'