Mew

Mew is a black-backed gull in Roverandom. Mew lives on a cliff-face (suggested by Hammond and Scull to be somewhere near Filey) and is the postman for the sand-sorcerer Psamathos Psamathides.

In the story, Mew takes Rover to the moon at the request of Psamathos; they fly via Mew's cliff-edge home, over the Isle of Dogs and see the seas flowing over the edges of the world. Whilst at the moon, Mew continues to deliver post to the Man-in-the-Moon before - once Roverandom's adventures on the moon are finished - taking Rover (now known as Roverandom) back to Psamathos.