One Green Open Squiggle 2013 March 12 Barry Schles E&S Library, Annales de Physique, Série 11, 3-4, 1935 Two Red Solid Squiggle 2011 July 13 Anonymous WeH 6403, former physics lounge balun (network) outlet Two Red Striped Diamond 2009 April 8 Collin King Hunt: American Banker 1988 Yearbook One Red Striped Oval 2008 April 13 Crystal M. Lee (MFA'10, Theatrical Lighting Design) Hunt: Jean Plaidy's The Spanish Inquisition Two Red Open Diamond 2008 April 9 Anonymous electrician Doherty 2nd basement cable tray One Green Solid Oval 2006 May 17 Anonymous (6) Hunt: Annales des Ponts et Chaussées, 1832 Two Green Open Oval 2006 May 17 Circulation Staff Hunt: Edward Quinn's Stars, Stars, Stars..., via book return Three Purple Solid Squiggle 2004 October 27 Christopher Brust Hunt: Peter Castine's Set Theory Objects Two Purple Solid Oval 2004 October 24 Anonymous (5) Hunt: J.S. Bach's Kunst der Fugue (BWV 1080) Three Purple Open Diamond 2004 September 13 Emmanuel Leclercq E&S Library, J-L. Krivine's Introduction to Axiomatic Set Theory Three Green Striped Squiggle 2004 May 13 Rebecca Lambert Wean 7500, projector booth opening Two Green Solid Oval 2004 March 9 Timm Mason E&S Library, Ph.D. thesis of Thomas Anderson Standish III, 24 May 1967 One Purple Open Oval 2003 June 26 Al Strittmatter Jr. Hamerschlag Hall B/C level half-height closet Three Purple Oval Striped 2003 May 15 Michael German and Christine Moeller In concrete above Doherty 2nd floor door to Wean Three Green Striped Oval 2002 December 9 Anonymous (4) Hamerschlag window ledge above A/B level stairway Two Purple Open Diamond 2002 August 5 Matthew Kaufman and Sophia Berman CFA 2nd floor under table Three Red Open Oval 2002 July 26 Anonymous (3) Baker Hall ledge above lobby One Purple Solid Oval 2002 July 18 J - The Finance Geek Wean Hall southwest stairway 9th floor ledge One Red Open Diamond 2002 May 16 Anonymous (2) CFA practice room 172 piano bench Three Purple Solid Oval 2002 May 16 Anonymous (1) West Wing 1st floor hallway ledge