Historical clue formulations

• Successively — 2014-10-05
• One after another — 2009-08-11
• Through regular order of succession — 2009-01-20
• Sequentially — 2007-02-18
• Successively — 2006-06-25
• By agreed order — 2005-09-11
• Sequentially — 2003-07-27
• By order of succession — 2002-02-18
• Sequentially — 2001-07-31