Fortunately, Newt woke up the next day. Not that it was likely that he would die in his sleep or anything, but surely, you agree it's fortunate that nothing like that ended up happening. But unfortunately, it seemed like everyone else had gone. Well, everyone except Bunty, but she doesn't count or something.
"Where's Theseus?" Newt asked her. By the way, it turns out Bunty is actually a young Professor Grubbly-Plank. This is canon now.
"Oh, he set off for Crete this morning," she said. "He said to let you sleep in after all you've been through. He also made some cookies for you before he left. They're in the shape of hippogriffs."
Newt tried one, heroically. "Extra sugary, just the way I like 'em. Darn it, why does he have to be so... perfect?"
"I think you're perfect, Newt," said Bunty infatuatedly. "Well, except that you wear way too many clothes. Don't get me wrong, I like a man in a suit, but I would like to see what you've got under it now and them. On the other hand, not letting me see it does build up a certain intrigue, so... well played, sir."
"I just don't understand why he took Credence with him," said Newt, not listening to whatever Bunty was babbling on about.
"Credence?" asked Bunty. "He didn't take Credence. Isn't Credence still in bed?"
"No, I just checked the guest bedroom. He's not there."
"Then where could he be?" asked Bunty.