This volume aims to make a contribution to codifying the methods and practices linguists use to recover language history, focussing predominantly on historical morphology. The volume includes studies on a wide range of languages: not only Indo-European, but also Austronesian, Sinitic, Mon-Khmer, Basque, one Papuan language family, as well as a number of Australian families. Few collections are as cross-linguistic as this, reflecting the new challenges which have emerged from the study of languages outside those best known from historical linguistics. The contributors illustrate shared methodological and theoretical issues concerning genetic relatedness (that is, the use of morphological evidence for classification and subgrouping), reconstruction and processes of change with a diverse range of data. The volume is in honour of Harold Koch, who has long combined innovative research on understudied languages with methodological rigour and codification of practices within the discipline.