Henry wants to go to Cape Coocoo but Mum won't let him. She's not going anywhere until Henry is dressed and studying in his room. Henry intends to stow away on Mum's ship.
Unlike normal walkthroughs, in Nice Game Hints you can select just the puzzle you want hints for. Here are listed the puzzles for "Chapter 1. The Mosse Family Business." in Henry Mosse and the Wormhole Conspiracy. The guide you choose only contains information about that puzzle, reducing possible spoilers for other puzzles.