As Donald Knuth has just published Volume 4, Fascicle 7 of The Art of Computer Programming (TAOCP), on constraint satisfaction, I would like to provide more information about the errors I discovered in 2019 in other volumes, for which I received two Knuth reward checks. To date, my account balance on his “bank”, the Bank of San Serriffe, is still 0x$2.40 (hexadecimal dollars). 0x$2.00 for two errors, and 0x$0.40 for two “valuable suggestions.” His response to my errors reports was faster than I ...