The Mountains of Fears by Henry C. Rowland

DOCTOR,” said my shipmate, Dr. Leyden, “have you ever made any especial study of nervous diseases—central nervous diseases—morbid conditions resulting from a derangement of the central cells?”

I told him that I had done only such work in this branch as a general practice would require, but that I had observed some few cases of especial interest during a military surgical service in the East, and proceeded to cite one or two instances of mental vagaries resulting from gunshot wounds in the head.