Calendar of State Papers, Spain, 5(2), 61, and footnote 1 The imperial ambassador, Eustace Chapuys informed Charles V that "he himself [Cromwell] has been "authorised and commissioned by the king to prosecute and bring to an end the mistress's trial, to do which he had taken considerable trouble...". "Calendar of State Papers, Spain". British-history.ac.uk. Retrieved 20 March 2014.