This haiku from Clark Ashton Smith (CAS) was unpublished in his lifetime, and is not available on The Eldritch Dark, so here's the full text:
Whereon we banged by fire-light
Clangors ranged the night.
It seems to me that this poem must refer to CAS' friendship with the poet Eric Barker and the dancer Madelynne Greene, which provided the inspiration for his poetic cycle The Hill of Dionysus. Barker and CAS would of course be the Bacchants, and Greene the lone Bacchante.