_Source of the Plot._ Shakespeare's tragedy is founded on a play called _The Troublesome Raigne of King John_ (author not known), which was printed (after stage performance) in 1591. Some people think that Shakespeare wrote _The Troublesome Raigne_. There are some glimmerings of his mind here and there in it; but not many. Whether he wrote it or not he certainly made free use of it in writing _King John_. He took from it with a bold hand, whenever he wished to spare himself mechanical labour. His other sources were the historians, Raphael Holinshed, Edward Hall, and Fabian. _The Fable._ King John has made himself King of England. Prince Arthur, who claims to be the rightful king (he is the son of King John's elder brother), causes the French King to support his claim. King John declares war against the French King. After some fighting in France the two kings patch up a peace. Arthur's claim is set aside. King John's niece is to marry the French King's son. At this point the Pope's legate causes the French King to break off the negotiations. The war begins again. King John captures Prince Arthur, and gives order that secretly he be put to death. England is in a disturbed condition. The French resolve to attempt the conquest of England. The report that Arthur has been murdered by the King's order sets England in turmoil. The French land in Kent. The lords find Arthur's dead body outside Northampton castle. They are convinced that King John has caused him to be murdered. King John finds that he cannot fight longer. He makes his submission to the Pope's legate, trusting that the legate may make the French King come to terms. The French King cannot be moved to peace. John summons up his forces, and gives successful battle to him. The English lords, who have allied themselves to the French King, break off and make their submission to King John. Without their help, the army is too weak. The French invasion comes to nothing. The Pope's legate makes peace. King John dies of poison given to him by a monk. Like the best Shakespearean tragedies, _King John_ is an intellectual form in which a number of people with obsessions illustrate the idea of treachery. The illustrations are very various. Perhaps the most interesting of them are those subtle ones that illustrate treachery to type, or want of conformity to a standard imagined or established.