York. Molly is the daughter of John McEachern, formerly a corrupt New York police officer, now prominent in English society and married to Spennie's mother. The broad outline of the plot then continues as in A Gentleman of Leisure, though the tone is substantially different: in The Gem Collector, Jimmy had been a jewel thief; in A Gentleman of Leisure he merely pretends to be one. Full plot (A Gentleman of Leisure) Wealthy Jimmy Pitt falls for a girl on the boat back from England. In New York he finds his old cronies excited by Love, the Cracksman, a new play in the Raffles vein. He makes a bet with his friend Arthur Mifflin, star of the play – he will break into a house that very night. Brooding on how to accomplish such a feat, his house is broken into by Spike Mullins, whom he persuades to accompany him on his mission. They pick a house recommended to Mullins by a friend, and break in, only to be caught by John McEachern, whom they convince that Pitt is a prominent London jewel thief. He arranges to be paid off, but his daughter Molly enters, and she and Jimmy recognise each other from their boat-trip. To keep his graft a secret, McEachern pretends to Molly that Pitt is a friendly passer-by. After a year wandering the globe, unable to find or forget Molly, Pitt is in London once more. Seeing a stranger in need in a restaurant, he comes to his aid, and so befriends Lord Dreever, known to all as Spennie. Wandering the streets with his new friend, they run into Spike Mullins, Jimmy's only link to Molly, who has fallen on hard times. Pitt takes him in. Next day, Spennie invites Jimmy to Dreever Castle, and he decides to take Spike with him as his valet. Spennie's Aunt Julia, we learn, owns a valuable necklace, and her husband Sir Thomas has hired a detective to protect it. Arriving at Dreever, there is no space in the car, so Jimmy volunteers to walk. He catches a riderless horse, and when he finds the rider, it is none other than Molly, who is also staying at Dreever. Her father is highly suspicious of Jimmy, even more so when he sees Spike also on the premises, but is unable to denounce them for fear of his own secret coming out, so