Epistulae et tractatus: cum Reformationis tum Ecclesiae Londino-Batavae historiam illustrantes : ex autographis mandante Ecclesia Londino-Batava

Published in the late 19th century, this collection of letters and treatises serves as a critical scholarly resource for the history of the Dutch Church in London, known as the Austin Friars Church. Commissioned by the consistory of the London-Dutch Church, the work was designed to make primary source documents—specifically autographs and historical records—accessible to researchers interested in the Reformation and the socio-religious integration of Dutch exiles in England during the Tudor and Stuart periods.

The project was edited by Jan Hendrik Hessels, a scholar noted for his meticulous approach to archival preservation and paleography. His editorial intent was to provide a faithful transcription of original manuscripts that document the theological disputes and administrative developments of the refugee congregation. The set is highly regarded within academic circles for its rigorous methodology and its role in illuminating the intellectual exchange between the Reformed communities in the Netherlands and the diaspora in London.