Bad Directions
Digger looked down, he was flying over a swamp. Well, that can't be right. He thought. Errol hadn't mentioned anything about a swamp. But he'd followed Errol's directions exactly. How could he be lost? Probably because that old owl gave me bad directions. He thought irritably. It made perfect sense, the owl was old and clearly confused. Of course he wouldn't give good directions.
He flew higher in the hopes of seeing something other than swamp. He did see something. There was an Other place up ahead. Sadly, not the one Errol had described. He flew toward it anyway. Luckily, no Others were around. The ones at Hogwarts were nice, but he didn't want to risk meeting too many.
Digger went inside an open window. There was a fire place in the room, and bunch of dust in a pot next to it. Why would anyone have dust near a fire place? He wondered. Then he heard movement above him. He quickly flew up so high he was touching the ceiling. An Other came down. He was too high for them to see. They went to the fire place and stepped in. Oookay. That's weird. Then the Other picked up some of the dust, said something, and threw the dust at the bottom. He went up in green flames! Then he was gone altogether.
Digger flew back down. Well, I guess that answers why the dust is there. Then he got an idea. He could use this to find the house Errol'd taked about. He picked up some dust with his talons and flew into the fire place. Now, what did that Other say? He thought of the place Errol had talked about. Then he said, to the best of his ability, what he'd heard.
(Obviously he won't end up in the right place. But he doesn't totally understand how this works yet.)