 A siege of the castle was started , but through papal intervention King Henry later entered on a more conciliatory path . A commission was appointed to draw up an arrangement that would be acceptable to both sides . The resulting Dictum of Kenilworth offered the rebels the right to buy back forfeited estates , at prices depending on their level of involvement in the rebellion . After initial resistance , the terms were eventually accepted . By the summer of 1267 , the country was pacified , and this spirit of reconciliation would last until the 1290s . The Dictum of Kenilworth was later incorporated into the Statute of Marlborough . 
