Historical clue formulations

• Followers of exes — 2014-02-09
• Some branched pipes — 2012-06-02
• Things that open and close yearly? — 2009-02-27
• Ex followers — 2006-03-12
• Forks — 2006-02-24
• Dowsing rods, essentially — 1999-09-19
• They follow exes — 1999-05-11
• Forks in the road — 1999-03-13
• Some electrical junctions — 1998-11-05