Possible Clues:

• Nightfall, in verse
• '___ now the gulf appears in view': Byron
• Hallow end?
• Dusk, to poets
• Dark time in poetry
• Hallow or velvet ending
• Early night, to a bard
• Bard's evening
• "Cant" or "Hallow" ending
• 'I should ___ die with pity': King Lear