Seamus Heaney's anthology, Death of a Naturalist, which included 'Personal Helicon', was initially published in 1966 and later received the Nobel Prize in Literature in 1995. The anthology was the first of his major volumes, followed by Door into the Dark in 1969 and Wintering Out in 1972. In total, Heaney published twelve poetry collections from 1966 until 2010, which included over five hundred poems.