Toby Takes a Tumble is a magazine story.
Toby is getting bored working at the quarry, so one day he goes to find the Fat Controller to ask for other work. On the way, he finds an old line, which he goes down. But the rails are weak, and buckle under Toby's weight- causing him to tumble into a ditch. Meanwhile, Henrietta is wondering where Toby is. She slips her brake and rolls to find Mavis, who then goes to Harold for help. Harold finds Toby, and Mavis soon rescues him. Toby is then grateful to work at the Quarry, and promises not to go exploring anymore.