...It leads to elopement, or thatslow canker in a girl’s nature ending in melancholy,or insanity... 
James W. Donovan 「Don't Marry」
... Could the Boer-woman have beheld Waldo at that instant, any lingering doubt which might have remained in her mind as to the boy’s insanity would instantly have vanished...
(AKA Ralph Iron) Olive Schreiner 「The Story of an African Farm」
...He probably had a touch of insanity, for he was in the habit of retiring no one knew whither, but perhaps into some cave, to remain in a hypnotic or mesmeric state until the moon was full...
David Livingstone 「Missionary Travels and Researches in South Africa」
...There is no consumption nor scrofula, and insanity and hydrocephalus are rare...
David Livingstone 「Missionary Travels and Researches in South Africa」
...It was probably either a sudden fit of insanity, or, having gone a little way out from the camp, he may have been carried off by a lion, as this part of the country is full of them...
David Livingstone 「Missionary Travels and Researches in South Africa」
...This iteration on the conscience causes insanity, and when one runs away in a wide country like this, the fugitive is never heard of...
David Livingstone 「Missionary Travels and Researches in South Africa」
... But in the evening a fresh accession of insanity occurred...
David Livingstone 「Missionary Travels and Researches in South Africa」
...To start with such men appeared mere insanity...
Samuel White Baker 「In the Heart of Africa」
...Should he becomeinsane after its commission the law steps in and protects him during theperiod of his insanity...
Ida B. Wells-Barnett 「The Red Record」
... Their approach to insanity is recognized and condemned...
Sidney L. Gulick 「Evolution Of The Japanese, Social And Psychic」
...In the incredible insanity of that raging fury thecraft of the green men hanging over the city were all but forgotten...
Various 「Astounding Stories of Super-Science, August 1930」
...The body politic, when in a state of insanity, cannot act more consistently with reason, than one of its members whose brain is disturbed by madness...
Paul Henri Thiery (Baron D'Holbach) 「The System of Nature, Volume 1」
...Furthermore, the rising tide of insanity in this country would bestemmed were religion and sex permanently divorced...
Dr. D.M. Brooks 「The Necessity of Atheism」
...He appeared to be in a state not far from insanity, as this anecdote certainly testifies; but the melancholy event had not had any other effect upon his mind...
David Collins 「An Account of the English Colony in New South Wales, Vol. 1」
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