Does Marjorie survive? Yes. She is found barely alive in the wreckage and eventually recovers, though she refuses or is unable to give a complete account of her captivity.
What happens to the Beetle? No identifiable body is recovered. Strange remains, stains, and bronze scarabs are found, but Champnell cannot prove whether the entity died, transformed, or escaped.
What happens to Robert Holt? He is found grievously abused and later dies of exhaustion. The exact circumstances of his final journey and death cannot be reconstructed with certainty.
Why does the Beetle persecute Lessingham? Lessingham escaped an Egyptian cult after becoming the companion or captive of the Woman of the Songs. The pursuit is revenge and an attempt to destroy him through Marjorie.
Whom does Marjorie marry? Paul Lessingham. After a long illness she recovers and becomes his wife; Atherton marries the heiress Dora Grayling.
Is the creature supernatural? The eyewitness accounts, transformations, mesmerism, and residue strongly support that reading, but the novel preserves a formal gap between testimony and proof.
Themes and What the Ending Means
Control of the will Mesmerism turns people into instruments who remain conscious of their humiliation. The deepest horror is not death but enforced participation.
Public confidence and private trauma Lessingham's mastery of Parliament depends on concealing a past that can still physically incapacitate him.
Science beside the occult Atherton's vapors are nearly as dangerous as the Beetle's powers. The novel refuses to make modern experimentation morally safer simply because it is called science.
Gender and unstable identity The Beetle's shifting sex terrifies characters who demand fixed categories, while Marjorie struggles against men who claim authority over her choices.
Imperial return The plot turns a British fantasy of entering and escaping foreign spaces into a fear that the colonized world can follow, judge, and retaliate in London.