The signal fire is the most potent source of hope for the boys, yet only Ralph and Piggy grasp its importance.
Latterly, the fire offers protection from the beast and this is more important for some, than rescue. Even Jack and the tribe are comforted by the fire.
It is ironic that the fire which smoked Ralph out of the forest attracts the attention of a nearby ship.
'We must make smoke on the top of the mountain. We must make a fire' (Ralph, ch2)
'The fire thrust out a savage arm of heat that crinkled hair instantly' ch2
'Quarter of a mile square forest was savage with smoke and flame' ch2
'The fire was right out, smokeless and dead; the watchers were gone' ch4
'The fire is the most important thing on the island. How can we ever be rescued, except by luck, if we don't keep a fire going?' (Ralph, ch5)
'We got no fire on the mountain. What's wrong with a fire down here? A fire could be built on them rocks' (Piggy, ch8)
'Ralph tried indignantly to remember. There was something good about a fire. Something overwhelmingly good' ch10