Daniel, venturing across springy floor-planks to this room’s eastern extremity, found himself embraced by windows—for this had originally been a sort of experimental balcony that had been encased in glass after it had failed to collapse for several consecutive years. Like a curd held up out of the whey by a strainer, he was being kept out of the Thames by perhaps a finger’s thickness of gappy planking. Between the boards he could see a gut of the river clashing and foaming along the edge of a starling. Vertigo—Hooke’s nemesis—claimed his attention for a few moments. Then he got the better of it and turned to gaze southeast at the Borough. A few moments sufficed to identify the Tatler-Lock, whose façade of blackened bricks rose up from the bank no more than two hundred yards away. For the better viewing of which, a perspective-glass lay on the windowsill. Above it, a single diamond-shaped pane had been punched out to allow for clear viewing. Hidden as it was beneath the furry, dribbling brow of the thatched eave, this would never be noted from the Tatler-Lock.