Saperdion was a famous Hetaira, the Empousa, a mythological monster. Kimberic or Cimberic means transparent.
A pure libel on this play, which is noted for its novel and successful attempt to represent humour without indecency. Aristophanes here alludes to the prevailing custom of concluding every group of three tragedies with a play in which the chorus consisted of Satyrs: a custom which Euripides broke through.
The inverted commas include here, as elsewhere in the Apology, only the very condensed substance of Mr. Browning's words.
Tin-islands. Scilly Islands, loosely speaking, Great Britain.