Historical clue formulations

• Good behavior ... or a hint to two lines of letters in this puzzle — 2011-07-14
• Manners — 2009-07-07
• Manners — 2004-09-18
• Things to mind — 2004-07-07
• Manners — 2003-04-15
• Manners — 2001-10-26
• Polite behavior — 2000-05-26
• Manners — 1994-07-27