What are the different similes and metaphors used in the poem "The Listeners," by Walter De La Mare?

Walter De la Mare's "The Listeners" uses the metaphor as
its central conceit, as indicated in the title, though the poem does not present many
discrete examples of metaphor or simile. 

The most
significant metaphor in the poem is the one that suggests that "phantom listeners" exist
in the house where the narrator comes to knock and receives no response. Silence or
emptiness thus becomes identified with phantoms in an extended
metaphor. 

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But only a host of phantom
listeners   

   That dwelt in the lone house
then

Stood listening in the quiet of the
moonlight   

   To that voice from the world of
men

The comparison
of silence/emptiness to phantoms is used for a large portion of the
poem.

Certain other parts of the poem utilize
personification. Although we might be tempted to stretch the conceptual definition of
metaphor to include personification, we should probably resist that urge and identify
phrases like "Their stillness answered his cry" as straight-forward examples of
personification.