Almost everything that is known about the trials comes from a report of the proceedings written by Thomas Potts, the clerk to the Lancaster Assizes. Potts was told to write his account by the trial judges, and had completed the work by 16 November 1612. Bromley revised and corrected the manuscript before its publication in 1613, and said it was "truly reported" and "fit and worthy to be published". Although written as an apparently verbatim account, the book is not a report of what was actually said at the trial, but instead a reflection on what happened. Nevertheless, Potts "seems to give a generally trustworthy, although not comprehensive, account of an Assize witchcraft trial, provided that the reader is constantly aware of his use of written material instead of verbatim reports".