‘It is not possible to settle on a method of classifying manuscripts in the abstract; the lost works whose content is being reconstructed can be dated more or less precisely and the classification only acquires significance if it is accompanied by the history of the text. Then many apparent anomalies of tradition automatically disappear […]. In several of his articles Paul Maas has helped to clarify the notion of Byzantine conjecture; it would have been nice if he had placed greater emphasis in his summary on the importance of a critical history.’