In the first of five essays on the art of storytelling, Philip Pullman reveals how Oxford provided inspiration for the setting of His Dark Materials.

In these personal, entertaining and deeply thoughtful essays, Philip Pullman examines the art of storytelling.

Written over a period of 30 years, they reflect on a wide range of topics including the origins of his own stories, the practice of writing and the storytellers who have most inspired him.

Today's essay reveals how his days at Oxford in the sixties provided the inspiration for the setting of His Dark Materials.

Adapted and produced by Kate McAll

A Pier production for BBC Radio 4.