Paging history folks

So in Rat-Catcher, the Roane prophecy warns of the fire and a great sickness. The fire is obviously the Great Fire of London but I can't find any hint of a great sickness that occurs after the fire. I will freely admit my grasp of history is shaky, but my Google-fu is only coming up with the Plague hitting London the year before the fire.

Is there something I am missing or is the Roane off a bit? I don't have the book with me, but I seem to remember a mention that the prophecies always have some error in them, maybe this is it? Or do you think Seanan got the dates wrong and I should shift the years for this world?

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 In other news, today's Tybalt song is David Bowie's Cat People (not the official video since that has scenes from the horror movie Cat People) and Selina's is Neon Jungle's Trouble.

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 Unexpected pleasures: Exploring how the cats of Milliways see the bar.

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 And I have hit the wall. Must get to bed early tonight.