Introduction: The article discusses how letters are being used across the disciplines, identifying similarities and differences in transcription, digitisation and annotation practices. It is based on a workshop held after the end of the project Digitising experiences of migration: the development of interconnected letters collections (DEM). The aims were to examine issues and challenges surrounding digitisation, build capacity relating to correspondence mark-up, and initiate the process of interconnecting resources to encourage cross-disciplinary research. Subsequent to the DEM project, TEI templates were developed for capturing information within and about migrant correspondence, and visualisation tools were trialled with metadata from a sample of letter collections. Additionally, as a demonstration of how the project’s outputs could be repurposed and expanded, the correspondence metadata that was collected for DEM was added to a more general correspondence project, Visual Correspondence.