Here Be Monsters! An Adventure Involving Magic, Trolls, and Other Creatures; The Ratbridge Chronicles Volume 1 Chapter 40

A Glimmer at the End of the Tunnel

• Fish leads the group to where Grandfather lives, and so Willbury and Grandfather finally get to meet.
• Grandfather knows that Arthur's been captured, but he has a machine that might help (though we don't get the details right away). Marjorie's not with them, but Willbury thinks Tom and Kipper can help with the job.