One of Diderot's writings composed about our present date (1747), the Promenade du Sceptique, did not see the light until after his death. His daughter tells us that a police agent came one day to the house, and proceeded to search the author's room. He found a manuscript, said, "Good, that is what I am looking for," thrust it into his pocket, and went away. Diderot did his best to recover his piece, but never succeeded.[43] A copy of it came into the hands of Naigeon, and it seems to have been retained by Malesherbes, the director of the press, out of goodwill to the author. If it had been printed, it would certainly have cost him a sojourn in Vincennes.
We have at first some difficulty in realising how he police could know the contents of an obscure author's desk. For one thing we have to remember that Paris, though it had been enormously increased in the days of Law and the System (1719–20), was still of a comparatively manageable size. In 1720, though the population of the whole realm was only fourteen or fifteen millions, that of Paris had reached no less a figure than a million and a half. After the explosion of the System, its artificial expansion naturally came to an end. By the middle of the century the highest estimate of the population does not make it much more than eight hundred thousand.[44] This, unlike the socially unwholesome and monstrous agglomerations of Paris or London in our own time, was a population over which police supervision might be made tolerably effective. It was more like a very large provincial town. Again, the inhabitants were marked off into groups or worlds with a definiteness that is now no longer possible. One-fifth of the population, for instance, consisted of domestic servants.[45] There were between twenty-eight and thirty thousand professional beggars.[46] The legal circle was large, and was deeply engrossed by its own interests and troubles. The world of authorship, though extremely noisy and profoundly important, still made only a small group. One effect of a censorship is to produce much gossip and whispering about suspected productions before they see the light, and these whispers let the police into as many secrets as they choose to know.
In Diderot's case, his unsuspecting good-nature to all comers made his affairs accessible enough. His house was the resort of all the starving hacks in Paris, and he has left us more than one graphic picture of the literary drudge of that time. He writes, for instance, about a poor devil to whom he had given a manuscript to copy. "The time for which he had promised it to me expired, and as my man did not appear, I became uneasy, and started in search of him. I found him in a hole about as big as my fist, almost pitch-dark, without the smallest scrap of curtain or hanging to cover the nakedness of his walls, a couple of straw-bottomed chairs, a truckle-bed with a quilt riddled by the moths, a box in the corner of the chimney and rags of every sort stuck upon it, a small tin lamp to which a bottle served as support, and on a shelf some dozen first-rate books. I sat talking there for three-quarters of an hour. My man was as bare as a worm, lean, black, dry, but perfectly serene. He said nothing, but munched his crust of bread with good appetite, and bestowed a caress from time to time on his beloved, on the miserable bedstead that took up two-thirds of his room. If I had never learnt before that happiness resides in the soul, my Epictetus of Hyacinth Street would have taught it me right thoroughly."[47]
The history of one of these ragged clients is to our point. "Among those," he wrote to Madame Voland,[48] "whom chance and misery sent to my address was one Glénat, who knew mathematics, wrote a good hand, and was in want of bread. I did all I could to extricate him from his embarrassments. I went begging for customers for him on every side. If he came at meal-times, i would not let him go; if he lacked shoes, I gave him them; now and then I slipped a shilling into his hands as well. he had the air of the worthiest man in the world, and he even bore his neediness with a certain gaiety that used to amuse me. I was fond of chatting with him; he seemed to set little store by fortune, fame, and most of the other things that charm or dazzle us in life. Seven or eight days ago Damilaville wrote to send this man to him, for one of his friends who had a manuscript for him to copy. I send him; the manuscript is entrusted to him—a work on religion and government. i do not know how it came about, but that manuscript is now in the hands of the lieutenant of police. Damilaville gives me word of this. I hasten to my friend Glénat, to warn him to count no more upon me. 'And why am I not to count upon you?' 'Because you are a marked man. The police have their eyes upon you and 'tis impossible to send work to you.' 'But, my dear sir, there's no risk, so long as you entrust nothing reprehensible to my hands. The police only come here when they scent game. I cannot tell how they do it, but they are never mistaken.' 'Ah well, I at any rate know how it is, and you have let me see much more in the the matter than I ever expected to learn from you,' and with that I turn my back on my rascal." Diderot having occasion to visit the lieutenant of police, introduced the matter, and could not withhold an energetic remonstrance against such an odious abuse of a man's kindness of heart, as the introduction of spies to his fireside. M. de Sartine laughed and Diderot took his leave, vowing that all the wretches who should come to him for the future, with cuffs dirty and torn, with holes in their stockings and holes in their shoes, with hair all unkempt, in shabby overcoats with many rents, or scanty black suits with starting seams, with all the tones and looks of distressed worth, would henceforth seem to him no better than police emissaries and scoundrels set to spy on him. The vow, we may be sure, was soon forgotten, but the story shows how seriously in one respect the man of letters in France was worse off than his brother in England.
The world would have suffered no irreparable loss if the police had thrown the Sceptic's Walk into the fire. It is an allegory designed to contrast the life of religion, the life of philosophy, and the life of sensual pleasure. Of all forms of composition, an allegory most depends for its success upon the rapidity of the writer's eye for new felicities. Accuracy, verisimilitude, sustention, count for nothing in comparison with imaginative adroitness and variety. Bunyan had such an eye, and so, with infinitely more vivacity, had Voltaire. Diderot had not the deep sincerity or realism of conviction of the one; nor had he the inimitable power of throwing himself into a fancy, that was possessed by the other. He was the least agile, the least felicitous, the least ready, of composers. His allegory of the avenue of thorns, the avenue of chestnut-trees, and the avenue of flowers, is an allegory, unskilful, obvious, poor, and not any more amusing than if it's matter had been set forth without any attempt at fanciful decoration. The blinded saints among the thorns, and the voluptuous sinners among the flowers, are rather mechanical figures. The translation into the dialect required by the allegorical situation, of a sceptic's aversion for gross superstition on the one hand, and for gross hedonism on the other, is forced and wooden. The most interesting of the three sections is the second, containing a discussion in which the respective parts are taken by a deist, a pantheist, a subjective idealist, a sceptic, and an atheist. The allegory falls into the background, and we have a plain statement of some of the objections that may be made by the sceptical atheist both to revelation and to natural religion. A starry sky calls forth the usual glorification of the maker of so much beauty. "That is all imagination," rejoins the atheist. "It is mere presumption. We have before us an unknown machine, on which certain observations have been made. Ignorant people who have only examined a single wheel of it, of which they hardly know more than a tooth or two, form conjectures upon the way in which their cogs fit in with a hundred thousand other wheels. And then to finish like artisans, they label the work with the name of it's author."
The defender justifies this by the argument from a repeater-watch, of which Paley and others have made so much use. We at once ascribe the structure and movement of a repeater-watch to intelligent creation. "No—things are not equal," says the atheist. "You are comparing a finished work, whose origin and manufacture we know, to an infinite piece of complexity, whose beginnings, whose present condition, and whose end are all alike unknown, and about whose author you have nothing better than guesses."
But does not its structure announce an author? "No; you do not see who nor what he is. Who told you that the order you admire here belies itself nowhere else? Are you allowed to conclude from a point in space to infinite space? You pile a vast piece of ground with earth-heaps