Beyond that dock, the river curved slowly around to the right, towards London Bridge. As the midday twilight had faded to an ashy afternoon, Daniel had seen a boat shove off from the Old Swan: a tavern at the northern end of the bridge that drew its clientele from those who did not like to gamble their lives by penetrating its turbulent arches. The boat had been struggling upstream ever since, and it was close enough now that, with the aid of the spyglass in Daniel's pocket, he could see it carried only two passengers.