very soon. Pseudolus, an excellent liar, uses Philia's cheery disposition to convince Lycus that she has picked up a plague from Crete, which causes its victims to smile endlessly in its terminal stages. By offering to isolate her in Senex's house, he is able to give Philia and Hero some time alone together, and the two fall in love. But Philia insists that, even though she is in love with Hero, she must honor her contract with the Captain, for "that is the way of a courtesan." To appease her, he tells her to wait ("that's what virgins do best, isn't it?") inside, and that he will have the captain knock three times when he arrives. Pseudolus comes up with a plan to slip Philia a sleeping potion that will render her unconscious. He will then tell Lycus that she has died of the Cretan plague, and will offer to remove the body. Hero will come along, and they will stow away on a ship headed for Greece. Satisfied with his plan, Pseudolus steals Hysterium's book of potions and has Hero read him the recipe for the sleeping potion; the only ingredient he lacks is "mare's sweat", and Pseudolus goes off in search of some. Unexpectedly, Senex returns home early from his trip, and knocks three times on his own door. Philia comes out of the house, and, thinking that Senex is the Captain, offers herself up to him. Surprised but game, Senex instructs Philia to wait in the house for him, and she does. Hysterium arrives to this confusion, and tells Senex that Philia is the new maid that he has hired. Pseudolus returns, having procured the necessary mare's sweat; seeing that Senex has returned unexpectedly and grasping the need to keep him out of the way, Pseudolus discreetly sprinkles some of the horse-sweat onto him, then suggests that the road trip has left Senex in dire need of a bath. Taking the bait, Senex instructs Hysterium to draw him a bath in the long-abandoned house of Erronius. But while this is happening, Erronius returns home, finally having given up the search for his long-lost children. Hysterium, desperate to keep him out of the house where his master is bathing, tells the old man that his house has become haunted – a story seemingly confirmed by the sound of Senex singing in his bath. Erronius immediately determines to have