Three times, at intervals of thirty years, has a wave of unutterable terror swept across the Old Dominion, bringing thoughts of agony to every Virginian master, and of vague hope to every Virginian slave. Each time has one man's name become a spell of dismay and a symbol of deliverance. Each time has that name eclipsed its predecessor, while recalling it for a moment to fresher memory: John Brown revived the story of Nat Turner, as in his day Nat Turner recalled the vaster schemes of Gabriel. On September 8th, 1800, a Virginia correspondent wrote thus to the Philadelphia "United States Gazette":-- "For the week past, we have been under momentary expectation of a rising among the negroes, who have assembled to the number of nine hundred or a thousand, and threatened to massacre all the whites. They are armed with desperate weapons, and secrete themselves in the woods. God only knows our fate; we have strong guards every night under arms." It was no wonder, if there were foundation for such rumors. Liberty was the creed or the cant of the day. France was being rocked by revolution, and England by Clarkson. In America, slavery was habitually recognized as a misfortune and an error, only to be palliated by the nearness of its expected end. How freely anti-slavery pamphlets had been circulated in Virginia we know from the priceless volumes collected and annotated by Washington, and now preserved in the Boston Athenaeum. Jefferson's "Notes on Virginia," itself an anti-slavery tract, had passed through seven editions. Judge St. George Tucker, law-professor in William and Mary College, had recently published his noble work, "A Dissertation on Slavery, with a Proposal for the Gradual Abolition of it in the State of Virginia." From all this agitation a slave insurrection was a mere corollary. With so much electricity in the air, a single flash of lightning foreboded all the terrors of the tempest. Let but a single armed negro be seen or suspected, and at once on many a lonely plantation there were trembling hands at work to bar doors and windows that seldom had been even closed before, and there was shuddering when a gray squirrel scrambled over the roof, or a shower of walnuts came down clattering from the overhanging boughs. Early in September, 1800, as a certain Mr. Moseley Sheppard, of Henrico County in Virginia, was one day sitting in his counting-room, two negroes knocked at the door and were let in. They shut the door themselves, and began to unfold an insurrectionary plot, which was subsequently repeated by one of them, named Ben Woodfolk or Woolfolk, in presence of the court, on the fifteenth of the same month.