John Murray to Byron, 12 September 1816, on William Gifford's response to Childe Harold's Pilgrimage, Canto IV: 'He has been exceedingly ill with jaundice [...] He said he was unable to leave off last night, and that he had sat up until he had finished every line of the canto. It had actually agitated him into a fever [...] He had persisted this morning in finishing the volume [...] He says that what you have heretofore published is nothing to this effort. He says also, besides its being the most original and interesting, it is the most finished of your writings; and he has undertaken to correct the press for you.'