Answer:
You could probably figure out that the boys in the story are English schoolboys, and were more than likely being evacuated from their home country to escape the possibility of atomic warfare. (Does this help?)
Oblivious - Not aware of what is going on around you.
The description that would improve the setting in the passage above best is "Eating dinner one chilly evening, my master and I...". Because it will set the mood of the retelling of his master's story.
Abaddon - (Hebrew) Destroyer, Advisor. Said to be chief of demons. Sometimes regarded as the destroying angel.
Abdiel - (Arabic) from "Abd" meaning slave. Lord of slaves/slavery.
Abatu - An earth bound form of destructive/negative energy in the Order of the Nine Angles. Associated with rites of sacrifice.
Abduxuel - (Enochian) One of the demonic rulers of the lunar mansions.
Abigar - Can fortell future and give military advice.
Abigor - (Unk) allegedly a warrior demon who commands sixty legions. Weyer names him as god of Grand Duke of Hell. Appears in a pleasant form.
Aclahayr - (Unk) Of the fourth hour of the Nuctemeron, the genius spirit.
Adad, Addu - (Babylonian, Hittite) god of the storm.