Can somebody please tell me two times Piggy is ridiculed in Lord of the Flies?I would really appreciate it if you can support your answer with...

Ralph betrays Piggy in the very first chapter of
Lord of the Flies when he tells the other boys his true nickname.
Piggy had already asked Ralph not to tell them this--he was obviously trying to live it
down from the school in which he had come. When the boys were all introducing
themselves, Jack told Piggy that he was "talking too much," and
said

     
"Shut up, Fatty."
     Laughter rose.
     "He's not Fatty," cried
Ralph, "his real name's Piggy!"
     ... A storm of laughter arose and even
the tiniest child joined
in.

Piggy is derided again in
the moments before his death in Chapter 11. When he takes the conch and tries to speak,
the boys hoot and howl at him. Piggy tries to reason with
them.

    
"You're acting like a crowd of kids."
     The booing rose and died again as
Piggy lifted the white, magic shell.
     ... A great clamor rose among the
savages. Piggy shouted again.
     "Which is better--to have rules and agree,
or to hunt and kill?"
     Again the clamor and
again--