Frederic warns the young ladies that his old associates will soon return ("Stay, we must not lose our senses"), but before they can flee, the pirates arrive and capture the girls, intending to marry them ("Here's a first rate opportunity"). Mabel warns the pirates that the girls' father is a Major-General ("Hold, monsters!"), who soon arrives and introduces himself ("I am the very model of a modern Major-General"). He appeals to the pirates not to take his daughters, leaving him to face his old age alone. Having heard of the famous Pirates of Penzance, he pretends that he is an orphan to elicit their sympathy ("Oh, men of dark and dismal fate"). The soft-hearted pirates release the girls ("Hail, Poetry!"), making Major-General Stanley and his daughters honorary members of their band ("Pray observe the magnanimity"). Act II The Major-General sits in a ruined chapel on his estate, surrounded by his daughters. His conscience is tortured by the lie that he told the pirates, and the girls attempt to console him ("Oh dry the glist'ning tear"). The Sergeant of Police and his corps arrive to announce their readiness to arrest the pirates ("When the foeman bares his steel"). The girls loudly express their admiration of the police for facing likely slaughter by fierce and merciless foes. The police are unnerved by this and leave reluctantly. Left alone, Frederic, who is to lead the police, reflects on his opportunity to atone for a life of piracy ("Now for the pirates' lair"), at which point he encounters Ruth and the Pirate King. They have realised that Frederic's apprenticeship was worded so as to bind him to them until his twenty-first birthday – and, because that birthday happens to be on the 29th of February (in a leap year), it means that technically only five birthdays have passed ("When you had left our pirate fold"), and he will not reach his twenty-first birthday until he is in his eighties. Frederic is convinced by this logic and agrees to rejoin the pirates. He then sees it as his duty to inform the Pirate King of the Major-General's deception. The outraged outlaw declares that the pirates' "revenge will be swift and terrible" ("Away, away, my heart's on fire"). Frederic meets Mabel ("All is prepared"), and she pleads with him to stay ("Stay Frederic, stay"), but he feels bound by his duty to the pirates until his