Admiralty law came into being when ancient naval manners and customs were written down as the "Black Book of the Admiralty". This included the organization of the fleet under the Admiral, sea-maneuver rules such as not laying anchor until the Admiral's ship had, engagement rules, and the distribution of captured goods: one-fourth to the vessel owner, one-fourth to the king if the seamen were paid by the king's wages, and the rest divided among the crew and Admiral. Stealing a boat or an anchor holding a boat was punishable by hanging. Stealing an oar or an anchor was punishable by forty days imprisonment for the first offense, six months imprisonment for the second, and hanging for the third. Desertion was punishable by loss of double the amount of wages earned and imprisonment for one year. Cases were tried by jury in the Admiral's court.

Wines, vinegar, oil and honey imported shall be gauged by the
King's appointees.

- Judicial Procedure -

The office of Justice of the Peace was developed and filled by knights, esquires and gentlemen who were closely associated with the magnates. There was no salary nor any requirement of knowledge of the law. They were to pursue, restrain, arrest, imprison, try, and duly punish felons, trespassers, and rioters according to the law. They were expected to arrest vagrants who would not work and imprison them until sureties for good behavior was found for them. They also were empowered to inspect weights and measures. Trespass included forcible offenses of breaking of a fence enclosing private property, assault and battery, false imprisonment, and taking away goods and chattels.

The action of trespass was replacing private suits for murder and for personal injury.

Pardons may be given only for slaying another in one's own defense or by misfortune [accident], and not for slaying by lying in wait, assault, or malice aforethought.

Justices of Assize, sheriffs, and Justices of the Peace and mayors shall have power to inquire of all vagabonds and compel them to find surety of their good bearing or be imprisoned.

A reversioner shall be received in court to defend his right when a tenant for a term of life, tenant in dower, or by the Law of England, or in Tail after Possibility of Issue extinct are sued in court for the land, so as to prevent collusion by the demandants.

A person in debt may not avoid his creditors by giving his tenements or chattels to his friends in collusion to have the profits at their will.

Where there was a garnishment given touching a plea of land, a writ of deceit is also maintainable.