It shares the detail that the war kept going four years. The author builds up the focal thought that Elizabeth Van Lew was a spymaster amid the Civil War by including insights about the work that Van Lew did. The focal thought of the principal passage of The Dark Game is the Civil War endured longer than individuals at first anticipated that it would last.
What is your question
Vast means too large to see and trunk less means Legs without a body. If referring to problems that is a figurative way of saying it is too large of a problem and being trunkless means no substance. And too many little things building up to too many things.
Lots of interpretations above without a question or context. Sorry I wasn’t much more of a help
It can be said that this excerpt is an approach to the "forbidden door". it seems that the reader gets in the mood by reading this description.
The paragraph is full of vivid ideas which makes it simple to picture what is happening and how this person is feeling when listening to that tapping,