Historical clue formulations

• Humorist Ambrose who once defined "alone" as "in bad company" — 2020-04-08
• Ambrose who wrote "The Devil's Dictionary" — 2016-11-30
• "The Devil's Dictionary" author — 2015-10-02
• Writer of "Happiness, n. An agreeable sensation arising from contemplating the misery of another" — 2010-07-23
• See 23-Across — 2002-03-13
• "The Devil's Dictionary" author — 2000-03-28
• "Cobwebs From an Empty Skull" humorist — 1998-06-12
• Writer Ambrose — 1997-07-22