The common passages appear to be best explained as the type of borrowings sometimes found in works of the era (the borrowings from Thomas North's translation of Plutarch's Parallel Lives in Shakespeare's Antony and Cleopatra, for example) that have no bearing on questions of authorship.
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Eiros and Charmion are named after Cleopatra's attendants, Iras and Charmion (or Charmian); they are mentioned by the Roman historian Plutarch in his biography of Mark Antony (in his work Parallel Lives); they appear in Shakespeare's play Antony and Cleopatra, and John Dryden's play about Antony and Cleopatra, All for Love.
The Roman writer Plutarch, in his Parallel Lives, claims that the Emperor Domitian amused himself by catching flies and impaling them with needles.
The work takes material from the Attic Nights by Aulus Gellius, the Banquet of the Sophists by Ateneo, the Saturnalia of Macrobius, the Memorable deeds and sayings of Valerius Maximus, the Inventor of all things by Polidoro Virgilio, the Moralia and Parallel Lives of Plutarch and, above all, the Natural History of Pliny the Elder.