See his journal, ed. by W. E. K. Anderson (1972); his letters, ed. by Sir H. J. C. Grierson (12 vol., 1932–37); biographies by his son-in-law, J. G. Lockhart (10 vol., 1902) and E. Johnson (2 vol., 1970); studies by A. O. J. Cockshut (1969), R. Mayhead (1973), J. Millgate (1984), J. Wilt (1986), J. Kerr (1989), and A. N. Wilson (1989).
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