Historical clue formulations

• Stops: Abbr. — 2013-10-20
• Places where connections are made: Abbr. — 2010-07-15
• Union and others: Abbr. — 2010-01-15
• Metro map points: Abbr. — 2009-08-11
• Depots: Abbr. — 2009-06-08
• Stepping-off points: Abbr. — 2009-03-06
• Subway stops: Abbr. — 2008-08-04
• London's Covent Garden and others: Abbr. — 2007-09-22
• Subway map array: Abbr. — 2006-11-18
• Penn. and others — 2006-08-31
• Reading stops: Abbr. — 2005-09-09
• Points on a line: Abbr. — 2004-12-16
• Parts of a line: Abbr. — 2004-10-10
• On/off points: Abbr. — 2004-06-06
• They're found all along the line: Abbr. — 2001-09-19
• Training places?: Abbr. — 2000-05-14
• RR stops — 1999-12-26
• Stops on the I.R.T. — 1999-09-14
• AM selections: Abbr. — 1999-07-11
• L.I.R.R. stops — 1998-11-29
• Stops: Abbr. — 1998-04-16
• B.&O. stops — 1997-06-03
• L.I.R.R. stops — 1997-05-09
• Timetable listings: Abbr. — 1997-03-30
• Depots: Abbr. — 1997-02-15
• El stops: Abbr. — 1995-09-01
• Penn:, et al. — 1995-05-12
• Victoria et al.: Abbr. — 1995-04-28
• RR stops — 1994-08-30
• Termini: Abbr. — 1994-06-24
• Union and others: Abbr. — 1994-06-16