There is a report of Butler's trial published in Dunedin. It gives in full the speeches and the cross-examination of the witnesses, but not in all cases the evidence-in-chief. By the kindness of a friend in New Zealand I obtained a copy of the depositions taken before the magistrate; with this I have been able to supplement the report of the trial. A collection of newspaper cuttings furnished me with the details of the rest of Butler's career.