Cryptogram from Frankenstein; or, the modern prometheus, chapter 21

A fever succeeded to this. I lay for two months on the point of death; my ravings, as I afterwards heard, were frightful; I called myself the murderer of William, of Justine, and of Clerval. Sometimes I entreated my attendants to assist me in the destruction of the fiend by whom I was tormented; and at others I felt the fingers of the monster already grasping my neck, and screamed aloud with agony and terror. Fortunately, as I spoke my native language, Mr. Kirwin alone understood me; but my gestures and bitter cries were sufficient to affright the other witnesses.

The sentence you are solving goes here.

But I was doomed to live and in two months found myself as awaking from a dream, in a prison, stretched on a wretched bed, surrounded by gaolers, turnkeys, bolts, and all the miserable apparatus of a dungeon. It was morning, I remember, when I thus awoke to understanding; I had forgotten the particulars of what had happened and only felt as if some great misfortune had suddenly overwhelmed me; but when I looked around and saw the barred windows and the squalidness of the room in which I was, all flashed across my memory and I groaned bitterly.