Historical clue formulations

• Small antelope — 2013-11-28
• African antelope — 2012-02-03
• African antelope — 2011-03-09
• Small African antelope — 2009-08-13
• Graceful African antelope — 2009-07-15
• Small African antelope — 2006-09-28
• Small antelope — 2003-06-06
• Antelope with spikelike horns — 2001-06-02
• African antelope — 1999-12-22
• Small African antelope — 1997-01-05
• A safari quarry — 1994-11-18
• African antelope — 1994-01-23
• Antelope with snakelike horns — 1994-01-16