In this work, I present a 19th-century Basque sermon collection from the Perutxena house in Cildoz/Zildotz (Ezcabarte, Navarre) and provide some guidelines for its examination. After describing it, I show that this scattered collection actually constitutes a single corpus. Moreover, I identify the likely authors and provide some biographical data in order to find out when and where these sermons were preached. Then, I identify some of the bibliographical sources employed by the authors when producing the texts. Afterwards, I highlight the significance of researching the language and linguistic variation in the corpus. Finally, I claim that, including this collection, the abundant Basque preaching texts during that time in Navarre constitute a text genre in itself.