What specific imagery does Vera use in her dialogue that creates the specific mood?

As the story features two levels--a main story and a story-within-a-story--the tone and mood oscillate between comically light and eerily dark. Saki uses imagery to create an eery feeling as the hunting party returns. Saki employs images like "deepening twilight," noiseless walkers, and a hoarse voice that comes out of the dusk in order to keep the reader guessing about whether the hunting party is a part of the living or the undead.