I am not unmindful that there have been hundreds, perhaps thousands of author-heroes and heroines. Bacon, Locke, Lu ther, Voltaire,* Fourier, and Robert Owen were prominently of the former, and Mary Wollstonecraft and Frances Wright were decidedly among the latter. But it appears to me, that none of their writings have been quite such text-books of revolution, as those of Rousseau and Paine were, and those of Comte now are.