Claim: In Skylark Three, when the Osnomians are attacked by the hitherto-unseen natives of a planet called 'Fenachrone,' a character called Seaton destroys the Fenachrone battleship and captures a crew-member who tells Seaton the Fenachrone's plans to conquest the Universe.
Evidence: When the story begins DuQuesne announces a long absence from Earth, to find another species more knowledgeable than the Osnomians allied with protagonist Richard Seaton. Near the Green System, they are attacked by the hitherto-unseen natives of the planet 'Fenachrone', whose weaponry surpasses any known to Seaton or the Osnomians. Having used the 'zone of force' at first to conceal himself, and then to destroy the Fenachrone battleship, Seaton captures a leading crew-member, who reveals (upon interrogation) that the Fenachrone intend conquest of the entire Milky Way Galaxy, and eventually of the Universe, and that a message is already in progress toward the Fenachrone capital to summon aid. Upon their refusal, Seaton remotely destroys their reconnaissance spaceships, and then goes on to a full-fledged genocide, destroying their home planet and killing all the Fenachrone except an escaped colony ship led by one of their leading scientists. Increasing his technology still further by powering his new ship with uranium instead of copper, Seaton pursues and destroys the Fenachrone colony ship; but does not discover DuQuesne.