I'm Sorry I Haven't a Clue down opportunities to work on it as he preferred to remain a listener. The official, authorised history of the show and ISIRTA, "The Clue Bible" by Jem Roberts, was published by Preface Publishing in October 2009. Humphrey Lyttelton, primarily known as a jazz trumpeter and bandleader, was invited to be chairman because of the role played by improvisation in both comedy and jazz music. In the first series Lyttelton shared the role of chairman with Barry Cryer but he made it his own (especially once Cryer replaced Cleese as a regular panellist) and continued as chairman until his death on
Master I. A. M. of Zwolle Last Supper", and Ferdinand Columbus (the son of Christopher Columbus) owned a copy of "Allegory of the Transience of Life". Master I. A. M. of Zwolle Master I. A. M. of Zwolle (known works 1470–1490, lifetime estimated as ca. 1440–1504) was an anonymous Dutch goldsmith and engraver who signed many of his works with his initials I. A. M. or I. A., and added "Zwolle" to some. His work is characterized by crowded and active scenes of people, graded tones and crisp strokes. Only 26 works by his hand are extant. One theory of Master I. A. M.'s identity points