Before the guns on the Richmond and Kingston line of hills began, there was a fitful cannonade far away in the southwest, due, I believe, to guns being fired haphazard before the black vapour could overwhelm the gunners.
There are no more uses of "haphazard" in the book.
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She seemed to have a most haphazard system of record keeping.
The haphazard manner in which she spent money drove her husband crazy.