Who was the first boy to die in Lord of the Flies?

The first boy to die in Lord of the Flies is known only as "the boy with the mulberry birth mark". He is the one who complains about a "beastie" and after the fire he is never seen again.

Simon is killed next during the "dance", and finally Piggy.

Though at the end of the book Ralph says only two have died, there were actually three casualties.