Douglas Darden laughter was the laughter of three young girls, who were, in essence, their clients: the fourteen year-old twins, Cass and Polly, and their nineteen-year-old friend, Helen. Cass and Polly are most likely feminized renderings of the celestial twins of Greek mythology, Castor and Pollux (better known as Gemini), and their sister, Helen of Troy. Many of his original sketches and drawings for Oxygen House are now owned by the Museum of Modern Art, along with a select few of "Sex Shop" drawings; gifts of Darden's widow. The remainder of his drawings are held at the Avery Architectural and Fine Arts
Castor and Pollux (elephants) liked elephant the least. Henry Labouchère recorded: Castor and Pollux (elephants) Castor and Pollux were two elephants kept at the zoo Jardin des Plantes in Paris. They were killed and eaten, along with many other animals from the zoo, in late 1870 during the Siege of Paris. The two elephants may have been siblings, and were named after the twin brothers of Greek and Roman mythology. They had been popular before the siege for giving rides on their backs around the park, but the food shortages caused by the German blockade of the city eventually drove the citizens of Paris