When Horatio and the king receive letters from Hamlet indicating that the prince has returned to Denmark after pirates attacked his ship en route to England, Claudius concocts a plan to use Laertes’ desire for revenge to secure Hamlet’s death. Laertes will fence with Hamlet in innocent sport, but Claudius will poison Laertes’ blade so that if he draws blood, Hamlet will die.
Pearl Elizabethan Heart Lock Necklace. Ophelia to Hamlet: "I have remembrances of yours I have longed long to redeliver... Rich gifts wax poor when givers prove unkind." This necklace looks like something she may have tried to return to Hamlet when he begins acting cruelly towards her.