A few parts of the bridge had been kept free of buildings so that fires could not jump the river. In one of those gaps a burly woman stopped to fling a jar into the angry water below. Daniel could not see it from here, but he knew it would be painted with a childish rendering of a face: this a charm to ward off witch-spells. The water-wheels constructed in some of those arch-ways made gnashing and clanking noises that forced Waterhouse and Oldenburg, half a mile away, to raise their voices slightly, and put their heads closer together. Daniel supposed this was no accident – he suspected they were coming to a part of the conversation that Oldenburg would rather keep private from those sharp-eared Beefeaters.