unpacked a large cake of Sunlight Soap, a toothbrush, a packet of hairpins, a bottle of scent, a small folding armchair and a box of throat lozenges. Jane and Michael stared. “But I saw,” whispered Michael. “It was empty.” “Hush!” said Jane, as Mary Poppins took out a large bottle labelled “One Tea-Spoon to be Taken at Bed-Time.” A spoon was attached to the neck of the bottle, and into this Mary Poppins poured a dark crimson fluid. “Is that your medicine?” enquired Michael, looking very interested. “No, yours,” said Mary Poppins, holding out the spoon to him. Michael stared. He wrinkled up his nose. He began to protest. “I don’t want it. I don’t need it. I won’t!” But Mary Poppins’s eyes were fixed upon him, and Michael suddenly discovered that you could not look at Mary Poppins and disobey her. There was something strange and extraordinary about her — something that was frightening and at the same time most exciting.

But they knew, both of them, that something strange and wonderful had happened at Number Seventeen, Cherry-Tree Lane.

And when, at last, .... I stood in London with ten pounds in my hand - five of which I promptly lost - the ancestors dwelling in my blood who, all my life, had summoned me with insistent eldritch voices, murmured together, like contented cats.