Historical clue formulations

• "Porgy" novelist ___ Heyward — 2018-09-08
• "Porgy" novelist ___ Heyward — 2009-01-08
• Novelist ___ Heyward — 2004-04-17
• "Porgy" author ___ Heyward — 2000-12-09
• "Porgy" author _____ Heyward — 1995-07-09