No clue to the assailant was found.
Thudicum mentions the case of a man who walked from Strafford to Newcastle, and from Newcastle to London, where he died, and in his brain was found the breech-pin of a gun.

Neiman describes a severe gunshot wound of the frontal region, in which the iron breech-block of an old-fashioned muzzle-loading gun was driven into the substance of the brain, requiring great force for its extraction.

The patient, a young man of twenty-eight, was unconscious but a short time, and happily made a good recovery.

A few pieces of bone came away, and the wound healed with only a slight depression of the forehead.

Wilson speaks of a child who fell on an upright copper paper-file, which penetrated the right side of the occipital bone, below the external orifice of the ear, and entered the brain for more than three inches; and yet the child made a speedy recovery.
Baron Larrey knew of a man whose head was completely transfixed by a ramrod, which extended from the middle of the forehead to the left side of the nape of the neck; despite this serious injury the man lived two days.
Jewett records the case of an Irish drayman who, without treatment, worked for forty-seven days after receiving a penetrating wound of the skull 1/4 inch in diameter and four inches deep.