It was shortly after this momentous decision that he went to New York by invitation and made his most celebrated, though not in any respect his greatest, oration.(5) A large audience filled Cooper Union, February 27, 1860. William Cullen Bryant presided. David Dudley Field escorted Lincoln to the platform. Horace Greeley was in the audience. Again, the performance was purely literary. No formulation of new policies, no appeal for any new departure. It was a masterly restatement of his position; of the essence of the debates with Douglas. It cleansed the Republican platform of all accidental accretions, as if a ship's hull were being scraped of barnacles preparatory to a voyage; it gave the underlying issues such inflexible definition that they could not be juggled with. Again he showed a power of lucid statement not possessed by any of his rivals. An incident of the speech was his unsparing condemnation of John Brown whose raid and death were on every tongue. "You charge that we stir up insurrections among your slaves," said he, apostrophizing the slave-holders. "We deny it, and what is your proof? 'Harper's Ferry; John Brown!' John Brown was no Republican; and you have failed to implicate a single Republican in this Harper's Ferry enterprise. . . "John Brown's effort was peculiar. It was not a slave insurrection. It was an attempt by white men to get up a revolt among slaves, in which the slaves refused to participate. In fact, it was so absurd that the slaves with all their ignorance saw plainly enough that it could not succeed. That affair in its philosophy corresponds with the many attempts related in history at the assassination of kings and emperors. An enthusiast broods over the oppression of the people until he fancies himself commissioned by heaven to liberate them. He ventures the attempt which ends in little else than his own execution. Orsini's attempt on Louis Napoleon, and John Brown's attempt at Harper's Ferry were, in their philosophy, precisely the same. The eagerness to cast blame on old England in the one case and on New England in the other, does not disprove the sameness of the two things." The Cooper Union speech received extravagant praise from all the Republican newspapers. Lincoln's ardent partisans assert that it took New York "by storm." Rather too violent a way of putting it! But there can be no doubt that the speech made a deep impression. Thereafter, many of the Eastern managers were willing to consider Lincoln as a candidate, should factional jealousies prove uncompromising. Any port in a storm, you know. Obviously, there could be ports far more dangerous than this "favorite son" of Illinois.