Murmur is the fifty-fourth spirit named in the Ars Goetia. He is described as a Great Duke and Earl, appearing as a crowned warrior riding a griffin, with trumpets sounding before him. Murmur teaches philosophy and summons the souls of the dead so they may answer questions. He commands thirty legions of spirits.

In Blood Shall Follow, Vivienne has no need to be summoned. She has followed Edgar for years.

Her footprints lead him back to what he left behind. When a second set appears, it becomes clear that Vivienne was never the only one waiting for him.

Murmur’s seal belongs to this tale because the dead refuse to remain buried.

Sooner or later, Edgar must answer.