 How has Simon manipulated Mr. Oyster?
"Providence," Simon told her whilst fiddling with the aspirin bottle, "will provide." Simon seemed incapable of carrying the ball this morning, so Betty said, "But ... Mr. Oyster, if the future has developed time travel why don't we ever meet such travelers?" Mr. Oyster returned his glasses to their perch, bug-eyed Simon, but then nodded. Simon said, "You want to hire me to find a time traveler and in some manner or other—any manner will do—exhort from him the secret of eternal life and youth, which you figure the future will have discovered.
 He has traveled back in time thrice to attempt to bring back a time traveler
 He has traveled back in time thrice to attempt to bring back a time traveler  He has taken over $50,000 of Mr. Oyster's money based on unfulfilled investigations  He has discovered that Mr. Oyster is actually Arth from several decades ago  He has used the opportunity to travel to Oktoberfest on vacation, and never intended to grant Mr. Oyster's request