The trial of Lord Strafford[4] is one of the most important eras in the history of Parliamentary judicature. In that trial, and in the dispositions made preparatory to it, the process on impeachments was, on great consideration, research, and selection of precedents, brought very nearly to the form which it retains at this day; and great and important parts of Parliamentary Law were then laid down. The Commons at that time made new charges or amended the old as they saw occasion. Upon an application from the Commons to the Lords, that the examinations taken by their Lordships, at their request, might be delivered to them, for the purpose of a more exact specification of the charge they had made, on delivering the message of the Commons, Mr. Pym, amongst other things, said, as it is entered in the Lords' Journals, "According to the clause of reservation in the conclusion of their charge, they [the Commons] will add to the charges, not to the matter in respect of comprehension, extent, or kind, but only to reduce them to more particularities, that the Earl of Strafford might answer with the more clearness and expedition: _not that they are bound by this way of SPECIAL charge; and therefore they have taken care in their House, upon protestation, that this shall be no prejudice to bind them from proceeding in GENERAL in other cases, and that they are not to be ruled by proceedings in other courts, which protestation they have made for the preservation of the power of Parliament; and they desire that the like care may be had in your Lordships' House_."[5] This protestation is entered on the Lords' Journals. Thus careful were the Commons that no exactness used by them for a temporary accommodation, should become an example derogatory to the larger rights of Parliamentary process.