The Third Tetralogy: Prosecution for Murder Of One Who Pleads That He Was Acting in Self-Defence (2.4-2.5)

—but in fact he died several days later, after being placed under an incompetent physician. His death was due to the incompetence of the physician, and not to the blows which he received. The other physicians warned him that though he was not beyond cure, he would die if he followed this particular treatment. Thanks to your advice, he did die, and thereby caused an outrageous charge to be brought against myself.

Further, the very law under which I am being accused attests my innocence; it lays down that the guilt of a murder shall rest upon that party which acted from design. Now what designs could I have on his life which he did not also have on mine? I resisted him with his own weapons, and returned blow for blow; so it is clear that I only had the designs upon his life which he had on mine.