What is the significance of the Chapter 7 title, "Shadows and Tall Trees" in Lord of the Flies?

Golding chose all of his chapter titles to be relevant and
symbolically significant to the development of the characters and plot.  In chapter seven,
"Shadows and Tall Trees," the boys venture into the dense jungle to search for the beast.  The
connotation of "shadows and tall trees" suggests a frightening, dark atmosphere.  By the end of
the chapter as the boys climb the mountain to look for the
beast:

"the sun was
sliding quickly toward the edge of the world and in the forest were never far to seek"
(118-119). 

With his chapter title,
Golding reminds the reader that the jungle is always dark and shadowy and reinforces the
mysterious, uncertain quality of the island.  The boys fear the dark and its capacity for hiding
frightening animals or beasts; chapter seven, "Shadows and Tall Trees" deals with the boys' fears
directly in the manifestation of the beast.