Please explain the two deaths, Piggy's and Simon's, in Lord of the Flies by William Golding.

There are
actually three deaths in 's novel , but the two you mention can be
classified as murders and are therefor more egregious. The first death is the little boy with
the mulberry birthmark who is inadvertently killed in an out-of-control fire in chapter two; 's
death borders on accidental but 's death is flagrant murder.

Simon is killed
on a dark, stormy night after he has discovered the truth about the beast from the Lord of the
Flies. He is weak and exhausted, but he wants to tell the others that the beast is in all of
them, is part of them. He crawls through the dense foliage to get to the spot on the mountain
where the boys have all gathered to celebrate a successful hunt and eat meat. 

The boys have all gathered into a circle and begin to chant the same words as they do
on a hunt: Kill the beast! Cut his throat! Spill his blood! Do him in! Some ofassume the role
of a pig and a kind of a mock hunt ensues. The lightning, thunder, and rain are crashing around
them, and it is clear the boys who are chanting in a circle have gotten caught up in theand
emotion of their setting--and then Simon appears, crawling out of the woods in the dark. He
crawls to the center of the circle and tries to talk to them, but his words are unintelligible
to them and they do not listen.

The sticks fell and the
mouth of the new circle crunched and screamed. The beast was on its knees in the center, its
arms folded over its face. It was crying out against the abominable noise something about a body
on the hill. The beast struggled forward, broke the ring and fell over the steep edge of the
rock to the sand by the water. At once the crowd surged after it, poured down the rock, leapt on
to the beast, screamed, struck, bit, tore. There were no words, and no movements but the tearing
of teeth and claws.... Presently the heap broke up and figures staggered away. Only the
beast lay still, a few yards from the sea. Even in the rain they could see how small a beast it
was; and already its blood was staining the sand.

Simon
is dead, killed by the other boys, and the next day onlyseems to feel any sense of
responsibility or remorse for this act.

While Simon's death was an accident,
Piggy's was not. Whencomes and steals Piggy's glasses one night, Piggy has had enough. While he
has always been afraid of Jack--and probably still is, to some extent--he is ready to fight
back. It is not going to be a fair fight, however, because Piggy can barely see and, though he
has Ralph and the conch, Jack has a tribe of savages who no longer recognize the authority of
the conch. 

Piggy asks Which is betterto have rules and agree, or to hunt
and kill? It is not a difficult question for Jack, and he allowsto lever a boulder to drop on
Piggy, smashing both the boy and the conch. 

When the naval officer arrives
to rescue the boys, Ralph 

Ralph wept for the end of
innocence, the darkness of mans heart, and the fall through the air of the true, wise friend
called Piggy.