Fitzwilliam started an investigation into the charges in Dublin, but O'Roghan's record of forging documents was quickly produced, and for a time it seemed the allegations would fail for lack of credible evidence. Rather than let the matter lie, it was decided (perhaps at Perrot's urging) to inquire into the manner in which the allegations had been raised in the first place, a procedure likely to embarrass Fitzwilliam. The inquiry was held at Dublin by a commission that included several of Perrot's favourites on the Dublin council: Nicholas White, (Master of the Rolls in Ireland), Charles Calthorpe (Attorney General), and Nicholas Walsh (former Speaker of the House of Commons).