Instead of a reprimand for their previous negligence, the case seemed rather to require an eulogium on their praiseworthy caution after the mischief had happened; a grateful recognition of the promptitude of their zeal the moment that there was no longer any remedy.
There are no more uses of "negligent" in the book.
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Please forgive my negligence in not calling you sooner.
The jury found her criminally negligent in the fulfillment of her responsibilities.