 This dinner and talk was attended by some 400 guests, including former US Vice-President Richard Nixon, former Governor of New Jersey and president of pharmaceutical company Warner-Lambert Alfred E. Driscoll, and Senator Joseph Lister Hill, with the wife of the latter recalling the event in her memoirs.As part of the event, Illingworth on behalf of the Glasgow Royal Infirmary, received an oil portrait of Lord Lister, commissioned by Warner-Lambert from US artist Norman Rockwell.The Lister Centenary celebrations occurred in the year following Illingworth's formal retirement, but he continued to be active in administrative and honorary roles with colleges, societies and at the University of Glasgow well into his later years, with several of the positions reflecting his interest in the history of medicine.