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) (Terrine of Antelope with truffles), "Civet de Kangourou" (Kangaroo Stew) and "Chameau rôti à l'anglaise" (Camel roasted "à l'anglaise") The demise of the elephants was recorded in the "Lettre-Journal de Paris" (commonly known as the "Gazette des Absents"), a twice-weekly periodical published during the siege by Damase Jouaust and delivered, along with the mail, by balloon to avoid the encircling Prussian forces. The "Gazette des Absents" reported that Castor had been killed on 29 December 1870 and Pollux the following day, both by explosive steel-tipped bullets fired from a range of 10 m by M. Devisme. However, a menu from