Historical clue formulations

• Hirelings of old — 2015-09-26
• Feudal thralls — 2013-07-12
• Serfs of old — 2005-02-19
• Old laborers — 2000-07-16
• Anglo-Saxon laborers — 1999-01-14
• Literally, "day laborers" — 1995-09-23
• Workers of puzzledom — 1995-01-10