Jana Dambrogio is Thomas F. Peterson (1957) Conservator for Massachusetts Institute of Technology Libraries. She previously held positions at the US National Archives, the United Nations, and the Vatican Apostolic Archives. Daniel Starza Smith is Senior Lecturer in Early Modern English Literature at King's College London. His books include John Donne and the Conway Papers and (with coeditor Joshua Eckhardt) Manuscript Miscellanies in Early Modern England. He is General Editor of the correspondence of John Donne for Oxford University Press. Dambrogio and Smith are founders of the Unlocking History Research Group (letterlocking.org), an international and interdisciplinary team of experts dedicated to studying and preserving historical communication technologies.