It was astonishing, now that a presumption of insanity was raised, how many collateral circumstances were remembered to which a condition of mental disease seemed to afford the only explanation—among others, the unprecedented neglect of his corn stacks in the previous summer.
There are no more uses of "unprecedented" in the book.
Show samples from other sources
Human impact on the environment is increasing at an unprecedented rate.
The targeting of civilians is unprecedented in the conflict.