§19. _Bigamy_ is the crime of having two or more wives, and is also called _polygamy_. But bigamy literally signifies having _two_ wives, and polygamy any number more than one. These words, in law, are applied also to women having two or more husbands. A person having a lawful husband or wife living, and marrying another person, is guilty of bigamy. An unmarried person, also, who shall marry the husband or wife of another, is punishable in like manner. §20. _Incest_ is the marrying or cohabiting together as husband and wife, of persons related to each other within certain degrees. §21. _Opening a grave_ and removing a dead body for any unlawful purpose, or purchasing such body knowing it to have been unlawfully disinterred, is a crime. This offense is in some states punishable by imprisonment in a county jail, or by fine, and not in a state prison. §22. Persons sometimes advise or are knowing to the commission of felonies, but are not actually engaged in committing them. Such are _accessories_. He who advises or commands another to commit a felony, is called an _accessory before the fact_, and is punished in the same manner as the principal. If he conceals the offender after the offense has been committed, or gives him any aid to prevent his being brought to punishment, he is an _accessory after the fact_, and may be imprisoned or fined. §23. _Assault and Battery_ is unlawfully to assault or threaten, or to strike or wound another. Besides being liable to fine and imprisonment, the offender is liable also to the party injured for damages. §24. A _riot_ is the assembling together of three or more persons, with intent forcibly to injure the person or property of another, or to break the peace; or agreeing with each other to do such unlawful act, and making any movement or preparation therefor, though lawfully assembled. When riotous persons are thus assembled, and are proceeding to commit offenses, any judge, justice, sheriff, or other ministerial officer, may in the name of the state, command them to disperse. If they refuse, the peace officers are required to call upon all persons near to aid in taking the rioters into custody. Persons refusing to assist may be fined. §25. A sheriff or other officer voluntarily suffering a prisoner charged with or convicted of an offense, to _escape_, from his custody, is guilty of a misdemeanor. To _rescue_ a prisoner thus charged or convicted, is punishable in a similar manner. It is also a misdemeanor to assist a criminal, with a view to effect his escape, though he does not escape from jail. §26. A person taking upon himself to act as a public officer, and taking or keeping a person in custody unlawfully or without authority, is _false imprisonment_; for which the offender may be fined or imprisoned.