There are two interesting details in this fragment:
On that bleak hill-top: the words that and those create a sense of distance, and distance = isolation = vulnerability = fear of death (such as being snatched by a predator).
On that bleak hill-top: bleak is a 'dark' adjective, like miserable, dank, dour, lonely, brooding, harsh, barren, wasted, grim…
You can build your collection of gothic 'dark' adjectives by following your nose through an online thesaurus: http://thesaurus.com/browse/bleak
Let’s rewrite just this fragment.
