Pollock's interest in mythology and the unconscious is evident in his recurrent motifs of birds, eyes, crucifixions, and dogs. The canines that appear in paintings like Guardians of the Secret and The She-Wolf have been interpreted as references to the Roman myth of Romulus and Remus, human twins raised by a wolf; to the jackal-headed Egyptian god Anubis; to Cerberus, the dog who guards the entrance to the Greek underworld; to Freudian father-figures; or to Jungian mother-figures. Pollock's drawings depict female dogs carrying human nudes on their backs, or with humanoid stick figures inside them. Their meaning remains obscure.