Thomas B. Corbett, The Legislative Manual, of the State of Colorado
“ The Lords may not, by the law, try a commoner for a capital offense, on the information of the King or a private person, because the accused is entitled to a trial by his peers generally; but on accusation by the House of Commons, they may proceed against the delinquent, of whatsoever degree, and whatsoever be the nature of the offense; for there they do not assume to themselves trial at common law. The commons are then instead of a jury, and the judgment is given on their demand, which is instead of a verdict. So the Lords do only judge, but not try the delinquent. ”
