Historical clue formulations

• 15-Across frequenter, maybe — 2014-04-18
• Gentleman's partner — 2011-04-24
• Bookish type — 2011-03-13
• Gentleman's partner? — 2010-08-28
• Book burrower — 2010-05-06
• The American ___ (Phi Beta Kappa publication) — 2009-05-10
• Learned one — 2009-04-13
• Ph.D. recipient — 2008-09-29
• Erudite sort — 2007-04-18
• Library regular — 2004-04-11
• Librarygoer — 2000-02-02
• Intellectual — 1995-02-23
• Rhodes _____ — 1994-05-16