Historical clue formulations

• Some feet — 2017-10-15
• "Whose woods these are I think I know" has four — 2016-11-08
• "But, soft! What light through yonder window breaks?," e.g. — 2015-07-26
• Metric feet — 2006-12-05
• Metrical feet — 2005-06-14
• Poets' feet — 2004-11-28