William Herle was a sixteenth-century spy and diplomat who worked on behalf of the court of Elizabeth I and left behind hundreds of letters, which are housed in libraries and archives throughout Britain. The Letters of William Herle Project makes this corpus of letters, which were previously unpublished and unedited, available in one place for the first time, offering those interested in early modern history a rich and fascinating resource. Readers will find searchable transcripts of over three hundred of Herle's letters, written to and from such prominent figures as William Cecil (Lord Burghley) and Robert Dudley (Earl of Leicester). This resource also contains a series of indexes allowing readers to browse the letters by criteria such as recipient and archival location, as well as a selection of images that "illustrate features of the material nature of these letters." The introduction section provides concise background information about Herle and his correspondence. Released in 2006, the Letters of William Herle Project was edited by Robyn Adams, Senior Research Fellow at University College London's Centre for Editing Lives and Letters, and directed by Alison Wiggins, Lecturer in English Language at the University of Glasgow.