I softened considerably what related to the three days of wandering and starvation, because to have told him all would have been to inflict unnecessary pain: the little I did say lacerated his faithful heart deeper than I wished.
There are no more uses of "laceration" in the book.
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To treat a minor laceration, clean the cut and close it.
If tetanus shots are not up-to-date, it might be wise to get one after any laceration.