1. Diane Middlebrook (2003), Her Husband: Hughes and Plath – A Marriage (New York: Viking), p. 8
2. Neil Roberts (2006), Ted Hughes: A Literary Life (Basingstoke: Palgrave Macmillan), p. 1.
3. Elaine Feinstein (2001), Ted Hughes: The Life of a Poet (London: Weidenfeld & Nicolson), p. 28.
4. Brian Cox (1999), ‘Ted Hughes (1930–1998): A Personal Retrospect’, Hudson Review 52:1, pp. 31–2.
5. D.D. Bradley (1999), ‘Ted Hughes 1930–1998’, Pembroke College Cambridge Society Annual Gazette 73, p. 23.