It was a narrow street, meaner even than our temporary lodgings in Paris. Each house was clamped on to another house, all of them tottering like squat drunkards down to the river, the gable windows overhanging the cobbles below and blocking out the sky, so the pale sunshine striped the earth-plastered walls, like the slashing on a sleeve. The smell of the street was as strong as a farmyard’s. Every morning the women threw the contents of the chamber pots and the washing bowls from the overhanging windows and tipped the night-soil buckets into the stream in the middle of the street where it gurgled slowly away, draining sluggishly into the dirty ditch of the River Thames.

I wanted to live somewhere better than this, somewhere like the Princess Elizabeth’s garden with trees and flowers and a view down to the river. I wanted to be someone better than this: not a bookseller’s ragged apprentice, a hidden girl, a woman heading for betrothal to a stranger.

As I stood there, warming myself like a sulky Spanish cat in the sunshine, I heard the ring of a spur against a cobblestone and I snapped my eyes open and leaped to attention. Before me, casting a long shadow, was a young man. He was richly dressed, a tall hat on his head, a cape swinging from his shoulders, a thin silver sword at his side. He was the most breathtakingly handsome man I had ever seen.

All of this was startling enough, I could feel myself staring at him as if he were a descended angel. But behind him was a second man.

This was an older man, near thirty years of age, with the pale skin of a scholar, and dark deep-set eyes. I had seen his sort before. He was one of those who visited my father’s bookshop in Aragon, who came to us in Paris and who would be one of my father’s customers and friends here in London. He was a scholar, I could see it in the stoop of his neck and the rounded shoulders. He was a writer, I saw the permanent stain of ink on the third finger of his right hand; and he was something greater even than these: a thinker, a man prepared to seek out what was hidden. He was a dangerous man: a man not afraid of heresies, not afraid of questions, always wanting to know more; a man who would seek the truth behind the truth.

I had known a Jesuit priest like this man. He had come to my father’s shop in Spain, and begged him to get manuscripts, old manuscripts, older than the Bible, older even than the Word of God. I had known a Jewish scholar like this man, he too had come to my father’s bookstore and asked for the forbidden books, remnants of the Torah, the Law. Jesuit and scholar had come often to buy their books; and one day they had come no more. Ideas are more dangerous than an unsheathed sword in this world, half of them are forbidden, the other half would lead a man to question the very place of the earth itself, safe at the centre of the universe.