The reconciliation of the doctrine that liability is founded on blameworthiness with the existence of liability where the party is not to blame, will be worked out more fully in the next Lecture. It is found in the conception of the average man, the man of ordinary intelligence and reasonable prudence. Liability is said to arise out of such conduct as would be blameworthy in him. But he is an ideal being, represented by the jury when they are appealed to, and his conduct is an external or objective standard when applied to any given individual. That individual may be morally without stain, because he has less than ordinary intelligence or prudence. But he is required to have those qualities at his peril. If he has them, he will not, as a general rule, incur liability without blameworthiness. The next step is to take up some crimes in detail, and to discover what analysis will teach with regard to them. I will begin with murder. Murder is defined by Sir James Stephen, in his Digest of Criminal Law, /1/ as unlawful homicide with malice aforethought. In his earlier work, /2/ he explained that malice meant wickedness, and that the law had determined what states of mind were wicked in the necessary degree. Without the same preliminary he continues in his Digest as follows:-- [52] "Malice aforethought means any one or more of the following states of mind..... "(a.) An intention to cause the death of, or grievous bodily harm to, any person, whether such person is the person actually killed or not; "(b.) Knowledge that the act which causes death will probably cause the death of, or grievous bodily harm to, some person, whether such person is the person actually killed or not, although such knowledge is accompanied by indifference whether death or grievous bodily harm is caused or not, or by a wish that it may not be caused; "(c.) An intent to commit any felony whatever; "(d.) An intent to oppose by force any officer of justice on his way to, in, or returning from the execution of the duty of arresting, keeping in custody, or imprisoning any person whom he is lawfully entitled to arrest, keep in custody, or imprison, or the duty of keeping the peace or dispersing an unlawful assembly, provided that the offender has notice that the person killed is such an officer so employed."