Don Knuth has been very generously sending these checks (now certificates of deposit at The Bank of San Serriffe) as reward for my bug reports about his books.

27 Jan 2007

($5.44) 29 Apr 2007

($49.28) 22 Aug 2007

($2.56) 10 Feb 2008

($80.96) 25 May 2008

($5.76) 29 Oct 2008

(0x$50.A0) 23 Dec 2008

(0x$22.E0) 31 Jan 2009

(0x$4.00) 27 Mar 2009

(0x$7.20) 29 Apr 2009

(0x$6.40) 30 Oct 2009

(0x$69.96) 5 Jan 2010

(0x$5.80) 29 Oct 2010

(0x$5.20) 1 Dec 2010

(0x$8F.95) 29 April 2011

(0x$10.A0) 02 June 2011

(0x$C.40) 04 Feb 2012

(0x$16.60)