Historical clue formulations

• Small pianos — 2015-09-18
• Downsized uprights — 2013-01-06
• Small organs — 2010-06-19
• Upright relatives — 2009-03-07
• Grand relatives — 2006-03-30
• Upright relatives — 2004-08-13
• They have strings attached — 2002-12-01