The ERRATAS database is the primary output of the ERRATAS project, which surveyed all the sources of the Corpora of Early English Correspondence (CEEC-400) in order to investigate their editorial principles and practices. These sources are almost exclusively printed editions of English historical correspondence. The data in the ERRATAS database consists of surveys of: editorial principles (explicit statements or anything resembling such); editorial practices (features that can be found in the edited texts); editorial work (evidence of contributors other than the stated editor(s)). The database is in the form of an MS Access database file, which includes separate data entry forms for editorial principles and practices (ie. the texts). A manual is under compilation. Related material: ERRATAS checklist of editorial practices with audit word lists (working document) Corpus of Editorial Principles (in CEEC-400 Sources) List of editions used in CEEC-400 surveyed for the ERRATAS project (as of January 2018) Sairio, Anni, Samuli Kaislaniemi, Anna Merikallio & Terttu Nevalainen. 2018. “Charting orthographical reliability in a corpus of English historical letters”. ICAME Journal 42: 79–96. DOI: doi.org/10.1515/icame-2018-0005. Open access. Version history: 26.5.2020 Version 0.9 – Database unfinished (due to coronavirus restrictions). The current data has been checked twice. Material to be added in v1.0: database manual; database survey guidelines.