This article focuses on the second and last phase of the Dutch excavations (1964-1966) conducted underneath the garden south of the church of Santa Prisca and directed by Maarten Josefzoon Vermaseren. The results of these excavations have remained largely unpublished and only very recently have been restudied in the context of the Santa Prisca Project. Using archive material from both the KNIR Vermaseren Archive and the Archivio Storico of the archaeological service Rome, this project seeks out to reconstruct the social and institutional history of this pioneer project of Dutch archaeology abroad and at the same time aims to publish relevant archaeological information hidden in these records. This paper focuses on the data mining aspect of the project and offers a first comprehensive overview of the Vermaseren excavations in the garden of the Santa Prisca. First, however, the background of this project will be described in more detail, as well as the methodology used to unlock these legacy data.