Historical clue formulations

• Ltr. accompaniers — 2019-12-11
• S.A.S.E.'s, e.g. — 2012-08-30
• Bus. cards in commercial mailings, e.g. — 2011-12-21
• Ltr. accompaniers — 2010-06-06
• Cover ltr. accompaniers — 2009-11-17
• Bottom-of-letter abbr. — 2007-07-19
• Ltr. accompaniers — 2004-04-21