The collection items in Monstrous Marginalia were sourced from the British Library and the Bodleian Library’s digital collections of medieval manuscripts. Monstrous Marginalia was constructed bearing in mind the terms of reuse delineated by both the British Library and the Bodleian Library. The British Library’s Catalogue of Illuminated Manuscripts was kindly made available under a Creative Commons CC0 1.0 Universal Public Domain Dedication. The Bodleian Library’s Collection of Western Medieval Manuscripts was kindly made available under a Creative Commons non-commercial license, with attribution (CC-BY-NC 4.0).