sailors for centuries have calculated their position by the stars with ever more precise calibrations, and since for those same centuries all our charts of the heavens have been based on erroneous beliefs about the movement of the stars and planets in their spheres, I am curious to know how navigators and cartographers will adapt to the new configuration of the universe, now that we know the Sun and not the Earth lies at its centre, and that the fixed stars are no such thing, their sphere no longer the outer limit of the cosmos. I wonder if these are ideas I could discuss with an experienced sailor like Knollys. He circumnavigated the globe with Drake in 1577, according to Sidney, on the voyage that made them famous and wealthy men; surely in the course of such a journey the calculations they made must have added up to confirmation that the Earth turns about the Sun and not the reverse? Drake and the men who sailed with him are forbidden by the Queen from publishing accounts or maps of their route, for fear they would fall into the hands of the Spanish, but perhaps Knollys might be persuaded at least to discuss the scientific discoveries of his travels with me in confidence, as one man of learning to another.
Ahead the Thames gleams like beaten metal as clouds scud across the face of the sun and their shadows follow over the water; in this light, you could almost forget it is a soup of human filth. I rest my forearms on the wooden guardrail and look down. I must check myself; with my state so precarious, it behoves me to be wary of what I say in public, until I know how it may be received. Knollys is, by all accounts, a good Protestant, like his brother-in-law Leicester and Sidney, but I would be a fool to imagine that these ideas of the Pole Copernicus have been accepted by more than a very few. Only two years ago I was openly ridiculed at the University of Oxford for expressing such a view in a public debate. Just because the Inquisition cannot reach me in Elizabeth’s territories, it does not follow that all Englishmen are enlightened.
We make steady progress along the river as it widens towards the estuary, here and there passing clusters of dwellings little more than shacks, where fishing boats bob alongside makeshift jetties. To either side the land is flat and marshy, pocked with pools reflecting the pale expanse of the sky. London gives you a sense of being hemmed in, pressed on all sides; there the sky is a dirty ribbon glimpsed if you crane your neck between the eaves of tall houses that lean in towards one another across narrow alleys, blocking the light. As we move further from the city, I feel my shoulders relax; the air freshens and begins to carry a tang of salt, and I inhale deeply, relishing this new sense of space. The sounds grow familiar: the snap of sailcloth, the creaks and groans of moving timber, the rhythmic breaking of waves against the hull as we rise and fall, the endless skwah-skwah of the gulls.
After supper, while Sidney settles to cards with Knollys and his gentlemen officers, I excuse myself and return to the deck. The wind is keener now and I have to wrap my cloak close around me against the cold, but I had rather be here in the salt air than confined in the captain’s cabin, with its fug of tobacco smoke and sweet wine. Directly ahead, the sun has almost sunk into the water, leaving the sky streaked orange and pink in its wake. To our right, or what Sidney insists I call starboard, the English coast is a dark smudge. To the left, on the other side of the endlessly shifting water, lies France, and I narrow my eyes towards the distant clouds as if I could see it.
The boards creak behind me and Sidney appears at my side, a clay pipe clamped between his teeth. He takes out a tinder-box from the pouch at his belt and battles for some moments to light it in the wind.
‘Thinking again, Bruno?’
‘It is a living, of sorts.’
He grunts, takes the pipe from his mouth, puffs out a cloud of