King Arthur thought he saw Sir Gawain appear before him accompanied with beautiful women. Sir Gawain begs Arthur not to battle Sir Modred because if he does, Arthur will die. Gawain states that Sir Launcelot will arrive within a month and defeat Modred. Arthur sends his squires to make a treaty with Sir Modred.
King Arthur and Sir Modred met the next day and signed a treaty. Both men suspected the other of treachery. One of the soldiers was bit in the food by a snake and accidentally drew his sword to kill it. Once the other soldiers saw the sword, a full attack went into play.
It's Arthur, isn't it?
HIC IACET ARTHURUS, REX QUONDAM REXQUE FUTURUS
King Arthur rammed his spear into Sir Modred. Both men ended up giving the other mortal wounds. Arthur was carried by his squires to a nearby chapel. Arthur commands Sir Bedivere to take the sword Excalibur and throw it into the lake.
Am I dead?
Once Bedivere finally through threw sword into a lake he saw a hand appear from below the surface and take the sword along with it. Sir Bedivere took Arthur to the water's edge where many ladies sat with their queen. The barge crossed the water while the ladies wept.
Sir Bedivere found the Archbishop of Canterbury kneeling and praying by a fresh tomb. Bedivere identified the grave as belonging to King Arthur and requested to stay for the hermitage.
Many in Britain believe King Arthur did not die and that he would return to win glory.