'Mount up,' Enoch commands, and nods at the horse. Ben needn't be asked twice. He's up like a spider. Enoch follows as soon as dignity and inertia will allow. They share the saddle, Ben on Enoch's lap with his legs thrust back and wedged between Enoch's knees and the horse's rib-cage. The horse has, overall, taken a dim view of the Ferry and the Faculty, and bangs across the plank as soon as it has been thrown down. They're pursued through the streets of Charlestown by some of the more nimble Doctors. But Charlestown doesn't have that many streets and so the chase is brief. Then they break out into the mephitic bog on its western flank. It puts Enoch strongly in mind of another swampy, dirty, miasma-ridden burg full of savants: Cambridge, England.