Allan Pinkerton, The spy in the rebellion; being a true history of the spy system of the United States Army during the late rebellion, revealing many secrets of the war hitherto not made public, compiled from official reports prepared for President Lincoln , General McClellan and the Provost-Marshal-General .

[36] It was during this canvass that Mr. Lincoln made the forcible and revolutionizing declaration that: “The Union cannot permanently endure half slave and half free.” Mr. Lincoln was defeated, however, and Mr. Douglas was returned to the Senate, much against the wishes of those Democrats who desired the unlimited extension of the institution of Slavery.

In the following year occurred the slave insurrection in Virginia, under the leadership of that bold abolitionist, John Brown. The movement was frustrated, however, and John Brown, after a judicial trial for his offense, was sentenced to be hung. Up to the day of his execution he remained firm in the belief that he had but performed his duty toward enslaved humanity, and he died avowing the justice of his cause and the hope of its ultimate success.

All of these occurrences tended to engender a spirit of fierce opposition in the minds of the Southern leaders. The growing sentiment of abolitionism throughout the North, and the manifest disposition to prevent its increase or extension, aroused the advocates of Slavery to a degree of alarm, which led to the commission of many actions, both absurd and unjustifiable.

The year of 1860 opened upon a scene of political agitation which threatened to disrupt long united associations, and to erect sectional barriers which appeared almost impossible to overcome.

In April, 1860, the Democratic National Convention