Book excerpt: Investigating a Corpus of Historical Oral Testimonies guides the reader through the process of sourcing a relevant oral history archive for linguistic analysis, constructing a representative corpus out of this archive and analysing this using corpus tools. Focusing on the oral history archive at the Irish Bureau of Military History, this book shows how corpus linguistics can illuminate themes worthy of investigation that may otherwise remain hidden. This is exemplified through the investigation of how certainty is constructed in this archive through a number of expressions and which serves as a template for both how oral history can aid linguistic understanding and how corpus linguistics can contribute to oral history investigation. Highlighting why oral history archives are worthy of linguistic analysis and showing what readers can gain from blending linguistic tools and competencies with oral history data, this book is essential reading for all researchers and students working in the areas of corpus linguistics, discourse analysis and oral history.