"By the Constitution of this United Kingdom, the House of Lords is the Court of Appeal in the last resort, and its decisions are authoritative and conclusive declarations of the existing state of the law, and are binding upon itself when sitting judicially, as much as upon all inferior tribunals. The observations made by members of the House, whether law members or lay members, beyond the ratio decidendi which is propounded and acted upon in giving judgment, although they may be entitled to respect, are only to be followed in as far as they may be considered agreeable to sound reason and to prior authorities. But the doctrine on which the judgment of the House is founded must be universally taken for law, and can only be altered by Act of Parliament. So it is, even where the House gives judgment in conformity to its rule of procedure, that where there is an equality of votes, semper presumitur pro negante."