Historical clue formulations

• Roman encyclopedist who died after the eruption of Vesuvius — 2013-05-28
• Roman writer who originated the phrase "with a grain of salt" — 2011-11-10
• "Elder" of ancient history — 2007-05-09
• Roman encyclopedist — 2004-12-19
• Roman naturalist — 2002-04-19
• "Natural History" author — 1999-04-09
• Author of "Historia naturalis" — 1997-01-16
• Roman naturalist — 1995-04-30