It is not suggested that in this particular case the deeds were devilish, but it is quite plain that such a principle once admitted might be made the legal cloak for unbridled passion and atrocious crime. There is no safe path for judges to tread but to ascertain the law to the best of their ability and to declare it according to their judgment; and if in any case the law appears to be too severe on individuals, to leave it to the Sovereign to exercise that prerogative of mercy which the Constitution has intrusted to the hands fittest to dispense it.