Something has been said in this discussion with regard to the example of Lord Erskine, who presided at the impeachment of Lord Melville. This was in 1806, during the short-lived ministry of Fox, when Erskine was Chancellor. It is by misapprehension that this instance is supposed to sustain the present assumption. When seen in its true light, it is found in harmony with the general rule. Erskine had at the time two characters. He was Lord Chancellor, and in this capacity presiding officer of the House of Lords, without the right to rule or vote, or even to speak. Besides being Chancellor, he was also a member of the House of Lords, with all the rights of other members. As we advance in this inquiry, it will be seen that again and again it has been practically decided, that, whatever the powers of a presiding officer who is actually a member, a presiding officer who is not a member cannot rule or vote, or even speak. In this statement I anticipate the argument. I do it at this stage only to put aside the suggestion founded on the instance of Lord Chancellor Erskine. * * * * * I begin with the most familiar authority,--I mean the eminent writer and judge, Sir William Blackstone. In his Commentaries, where is found, in elegant form, the complete body of English law, you have this whole matter stated in a few suggestive words:-- “The Speaker of the House of Lords, _if a Lord of Parliament_, may give his opinion or argue any question in the House.”[100] If not a Lord of Parliament, he could not give his opinion or argue any question. This is in accordance with all the authorities and unbroken usage; but it has peculiar value at this moment, because it is the text of Blackstone. This work was the guide-book of our fathers. It first appeared in 1765-69, the very period when the controversy with the mother country was fervid; and it is an unquestionable fact of history that it was read in the Colonies with peculiar interest. Burke, in one of his masterly orations, portraying the character of our fathers, says: “I hear that they have sold nearly as many of Blackstone’s Commentaries in America as in England.”[101] Nothing is clearer than that they knew it well. The framers of the National Constitution had it before them constantly. It was their most familiar work. It was to them as Bowditch’s Navigator is to the mariner in our day. They looked to it for guidance on the sea they were traversing. When they undertook to provide that the Chief Justice, who was not a member of the Senate, should preside at the impeachment of the President, they knew well that he could have no power to “give his opinion or argue any question in the House,” for Blackstone had instructed them explicitly on this head. They knew that he was simply a presiding officer, according to the immemorial usage of the upper House in England, with such powers as belong to a presiding officer who is not a member of the House, and none other.