Historical clue formulations

• Blood line — 2025-04-20
• Place to take shots — 2024-04-11
• Pathway for oxygenation — 2023-12-13
• Miner discovery? — 2022-08-31
• Blood line — 2021-08-08
• Target for a phlebotomist — 2019-12-11
• Line on a leaf — 2019-03-21
• Miner's find — 2018-01-28
• "In that ___ ..." — 2013-09-20
• Artery's counterpart — 2013-02-12
• Course through the body? — 2012-11-30
• Red Cross hot line? — 2012-09-19
• Thin blue line? — 2012-01-01
• Way to a man's heart? — 2010-05-25
• Blood line — 2009-09-29
• Target for Dracula — 2009-01-08
• Manner — 2006-06-01
• Blood line — 2004-08-07
• Marble feature — 2004-07-28
• Part of an internal network — 2004-03-26
• Way to one's heart — 2003-03-09
• Thin blue line, say — 2002-07-24
• Rib of a leaf — 2001-09-11
• Ore site — 2001-02-04
• Coal site — 1998-04-30
• Style — 1998-04-02
• Phlebotomy target — 1997-11-28
• Manner, as of writing — 1996-11-24
• Blood carrier — 1995-09-11
• Marble marking — 1995-07-06
• Blue vessel — 1994-09-03
• Gold source — 1994-01-30