1531: it is the summer of the comet. In the long dusk, beneath the curve of the rising moon and the light of the strange new star, black-robed gentlemen stroll arm in arm in the garden, speaking of salvation. They are Thomas Cranmer, Hugh Latimer, the priests and clerks of Anne's household detached and floated to Austin Friars on a breeze of theological chit-chat: where did the church go wrong? How can we drift her into the right channel again? ‘It would be a mistake,’ he says, watching them from the window, ‘to think any of those gentlemen agree one with the other on any point of the interpretation of scripture. Give them a season's respite from Thomas More, and they will fall to persecuting each other.’Gregory is sitting on a cushion and playing with his dog. He is whisking her nose with a feather and she is sneezing to amuse him. ‘Sir,’ he says, ‘why are your dogs always called Bella and always so small?’Behind him at an oak table, Nikolaus Kratzer, the king's astronomer, sits with his astrolabe before him, his paper and ink. He puts down his pen and looks up. ‘Master Cromwell,’ he says lightly, ‘either my calculations are wrong, or the universe is not as we think it.’He says, ‘Why are comets bad signs? Why not good signs? Why do they prefigure the fall of nations? Why not their rise?’Kratzer is from Munich, a dark man of his own age with a long humorous mouth. He comes here for the company, for the good and learned conversation, some of it in his own language. The cardinal had been his patron, and he had made him a beautiful gold sundial. When he saw it the great man had flushed with pleasure. ‘Nine faces, Nikolaus! Seven more than the Duke of Norfolk.’In the year 1456 there was a comet like this one. Scholars recorded it, Pope Calixtus excommunicated it, and it may be that there are one or two old men alive who saw it. Its tail was noted down as sabre-shaped, and in that year the Turks laid siege to Belgrade. It is as well to take note of any portents the heavens may offer; the king seeks the best advice. The alignment of the planets in Pisces, in the autumn of 1524, was followed by great wars in Germany, the rise of Luther's sect, uprisings among common men and the deaths of 100,000 of the Emperor's subjects; also, three years of rain. The sack of Rome was foretold, full ten years before the event, by noises of battle in the air and under the ground: the clash of invisible armies, steel clattering against steel, and the spectral cries of dying men. He himself was not in Rome to hear it, but he has met many men who say they have a friend who knows a man who was.He says, ‘Well, if you can answer for reading the angles, I can check your workings.’Gregory says, ‘Dr Kratzer, where does the comet go, when we are not looking at it?’The sun has declined; birdsong is hushed; the scent of the herb beds rises through the open window. Kratzer is still, a man transfixed by prayer or Gregory's question, gazing down at his papers with his long knuckly fingers joined. Down below in the garden, Dr Latimer glances up and waves to him. ‘Hugh is hungry. Gregory, fetch our guests in.’‘I will run over the figures first.’ Kratzer shakes his head. ‘Luther says, God is above mathematics.’Candles are brought in for Kratzer. The wood of the table is black in the dusk, and the light settles against it in trembling spheres. The scholar's lips move, like the lips of a monk at vespers; liquid figures spill from his pen. He, Cromwell, turns in the doorway and sees them. They flitter from the table, skim and melt into the corners of the room.