Little Lea is the name of the house in the outskirts of Belfast where C.S. Lewis grew up. When, as a child, Lewis looked out over this prospect, he saw the fields and woods where he and his brother and their friend Arthur Greeves liked to walk and a landscape that he believed had shaped his imagination. Like many of the places I sought out in researching The Magician's Book it has been completely transformed since then in a way he would have deplored. More often than not, in trying to follow in his footsteps, I found myself in suburbs or skirting the edge of golf courses.