HG Wells Sustaining Tension

Then there is a gap in time; tension starts to unwind slowly. He wakes up the next morning after being rescued at dawn by the old people. He personifies fear with the red room. He has had a fight with his fear and in the end his fear wins. For me, the red room symbolizes one's own fear. Nothing is actually in the room except what one believes is there.
The tension in the story is the unknown. Any passage relating to the unknown could build tension.
Language plays an important part and changes with characters. The old people have an old English vocabulary, whereas the young man is given a very upper class and stylish vocabulary. Around the epiphany of the story, the language relating to the young man's experience is described in very short sentences with a lot of punctuation.
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