 They found their way to Dublin Castle and to Superintendent Daniel Ryan head of G Division.Ryan had an informer within the offices of the Irish People named Pierce Nagle, he supplied Ryan with an "action this year" message on its way to the IRB unit in Tipperary.With this information, Ryan raided the offices of the Irish People on Thursday 15 September, followed by the arrests of O’Leary, Luby and O’Donovan Rossa.