The last time that William went to the gym is:
By a certain point in story, Sancho and Bolsa have already exhausted many of the clues they had to find William, some because people had no information, and others because where they expected to find him had already left or was Mrs. Morningstar who I was going.
After a while, they find out that William attends the gym and when they go to find out they find out that he was just there that morning.
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