Historical clue formulations

• Lepers — 2018-09-15
• Untouchables — 2018-06-09
• Personae non gratae — 2017-06-03
• Shunned ones — 2015-07-05
• Outcasts — 2004-04-04
• Lowest of the low — 2001-07-29
• Outcasts — 1997-08-14