He says,-- 'No person practically acquainted with the true characteristics of insanity would affirm, that, had this idea of "incest" been an insane hallucination, Lady Byron could, from the lengthened period which intervened between her unhappy marriage and death, have refrained from exhibiting it, not only to legal advisers and trustees (assuming that she revealed to them the fact), but to others, exacting no pledge of secrecy from them as to her mental impressions.

Lunatics do for a time, and for some special purpose, most cunningly conceal their delusions; but they have not the capacity to struggle for thirty-six years, as Lady Byron must have done, with so frightful an hallucination, without the insane state of mind becoming obvious to those with whom they are daily associating.

Neither is it consistent with experience to suppose, that, if Lady Byron had been a monomaniac, her state of disordered understanding would have been restricted to one hallucination.

Her diseased brain, affecting the normal action of thought, would, in all probability, have manifested other symptoms besides those referred to of aberration of intellect.
'During the last thirty years, I have not met with a case of insanity (assuming the hypothesis of hallucination) at all parallel with that of Lady Byron.

In my experience, it is unique.