1911-1979 1917-1977 1926-1995 1939-2013 20thcentury american americanpoetry criticismandinterpretationbishop criticismandinterpretationheaney criticismandinterpretationlowell criticismandinterpretationwalcott derek elizabeth english english-speakingcountries englishpoetry history historyandcriticism historyinliterature james jamesingram literatureandhistory memorialsinliterature memoryinliterature monumentsinliterature politicalpoetry politicsandliterature robert seamus versesatire