Croker, in his edition of _Boswell_, remarks that all the great English poets had no posterity. He names Shakespeare, Ben Jonson, Milton, Otway, Dryden, Rowe, Addison, Pope, Swift, Gay, Johnson, Goldsmith, Cowper. Hobbes, Camden, and many others, avoided marriage in order to have more time to devote to study. Michelangelo said, “I have more than enough of a wife in my art.” Among celibates may be mentioned also: Kant, Newton, Pitt, Fox, Fontenelle, Beethoven, Gassendi, Galileo, Descartes, Locke, Spinoza, Bayle, Leibnitz, Malebranche, Gray, Dalton, Hume, Gibbon, Macaulay, Lamb, Bentham, Leonardo da Vinci, Copernicus, Reynolds, Handel, Mendelssohn, Meyerbeer, Schopenhauer, Camoëns, Voltaire, Chateaubriand, Flaubert, Foscolo, Alfieri, Cavour, Pellico, Mazzini, Aleardi, Guerrazzi. And among women: Florence Nightingale, Catherine Stanley, Gaetana Agnesi (the mathematician), and Luigia Laura Bassi. A very large number of married men of genius have not been happy in marriage: Shakespeare, Dante, Marzolo, Byron, Coleridge, Addison, Landor, Carlyle, Ary Scheffer, Rovani, A. Comte, Haydn, Milton, Sterne, Dickens, &c. St. Paul boasted of his absolute continence; Cavendish altogether lacked the sexual instinct, and had a morbid antipathy to women. Flaubert wrote to George Sand: “The muse, however intractable, gives fewer sorrows than woman. I cannot reconcile one with the other. One must choose.”[39] Adam Smith said he reserved his gallantry for his books. Chamfort, the misanthrope, wrote: “If men followed the guidance of reason no one would marry; for my own part, I will have nothing to do with it, lest I should have a son like myself.” A French poet has said: “_Les grands esprits, d’ailleurs très-estimables,_ _Ont très peu de talent pour former leurs semblables._”[40] _Unlikeness to Parents._--Nearly all men of genius have differed as much from their fathers as from their mothers (Foscolo, Michelangelo, Giotto, Haydn, &c.). That is one of the marks of degeneration. For this reason one notes physical resemblances between men of genius belonging to very different races and epochs; for example, Julius Cæsar, Napoleon, and Giovanni of the Black Bands; or Casti, Sterne, and Voltaire. They often differ from their national type. They differ by the possession of noble and almost superhuman characters (elevation of the forehead, notable development of the nose and of the head, great vivacity of the eyes); while the cretin, the criminal, and often the lunatic, differ by the possession of ignoble features: Humboldt, Virchow, Bismarck, Helmholtz, and Holtzendorf, do not show a German physiognomy. Byron was English neither in his face nor in his character; Manin did not show the Venetian type; Alfieri and d’Azeglio had neither the Piedmontese character nor face. Carducci’s face is not Italian. Nevertheless, one finds very notable and frequent exceptions. Michelangelo, Leonardo da Vinci, Raphael, and Cellini, presented the Italian type.