CHAPTER SIXTEEN THE EXODUS FROM LONDON So you understand the roaring wave of fear that swept through the greatest city in the world just as Monday was dawning—the stream of flight rising swiftly to a torrent, lashing in a foaming tumult round the railway stations, banked up into a horrible struggle about the shipping in the Thames, and hurrying by every available channel northward and eastward.
There are no more uses of "exodus" in the book.
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Just to be thorough, she peeks in to make sure there are no stragglers, or kids trying to avoid the mass exodus.
Neal Shusterman -- Unwind
Packed up their camper on the afternoon of the sixth day with everything they could fit and hit the road, joining a mass exodus to somewhere else, because anywhere else seemed safer for some reason.