Signs of shine appear on Plumstead Marsh, just east of the Arsenal complex; Gertrude rushes through the foot tunnel and collects the others, and they go into the marsh. Bessie moves ahead and spots seven figures, coming to the end of a call-and-response chant; they’ve very visible magically, but fade out of normal vision, and start to walk towards the arsenal, passing a sentry who apparently doesn’t spot them. Bessie throws a stone at the leader – the woman from last night – which distracts her, but doesn’t apparently spoil the invisibility. They all turn and look, and one of them points – not towards Bessie but off to one side. They move over that way to search; Bessie throws another stone, and this time they spread out and start moving towards her. Bessie hides, but one of the searchers finds and grabs her; she appears to be shouting, though Bessie can’t hear her. Bessie manages to get out of the grapple and push hard against her shine, making her visible again; the shouting becomes audible. Audrey shoots a crane in the Arsenal, mostly to attract attention, and Gertrude starts pushing at the shine on the others; after a few seconds there’s a sound of whistles as the sentries call for assistance.