In "The Most Dangerous Game," what happened to Whitney after Rainsford left?
Whitney went to sleep and Rainsford went for a walk until he heard the gunshots which he followed, but they never told us about the fate of Whitney.
Whitney was sailing to Rio in the Amazon to hunt jaguar. He told Rainsford that he hoped the jaguar guns had come from Purdey's. Rainsford falls off the ship while the crew is asleep, so they wouldn't know he was gone till it was too late.
Reference: The Literature and Language Book by McDougal and Littell
Whitney probably made it to wherever they said they were going in the begining of the story.