"Ian McKellen underlines the Marquis' limp, but at the same time shows his animal vitality by the intensity of the contortions of his body, when, for example, to emphasise a point in an argument he leans across a table so that only his toes and his elbows hold him suspened, like a gymnast barre. His voice is the rich instrument of the born mob-orator with the histrionic inflections of a barnstorming actor; and he conveys all the wit and sheer intelligence, the exuberant, innocent overconfidence which make the amoralist more honest than the respectable squares who surround him." — Martin Esslin, Plays and Players Jan 1975