Mirabaud died in Paris in 1760, at the advanced age of nearly eighty-six years. Contemporary with him were D'Alembert, D'Holbach, Voltaire, Diderot, Helvetius, Condorcet, Buffon, Rousseau, Frederick II. of Prussia, Montesquieu, Grimm, Sir William Tempte, Toland, Tindel, Edmund Halley, Hume, Gibbon, Adam Smith, Franklin, and Darwin, forming a _role_ of names, whose fame will be handed down to posterity for centuries to come, as workers in the cause of man's redemption from mental slavery. If (as it appears very probably) it be the fact that Mirabaud had but little part in the authorship of "La Système de la Nature," D'Holbach, in using the name of his deceased friend, only associated him with a work which (judging from his other writings, the tenor of his life, and the noble character of his associates) Mirabaud would have issued with pride himself, had the book been really written by him. BARON D'HOLBACH. Paul Thyry, Baron D'Holbach, was born at Heidesheim, in the Palatinate, in the month of January, 1723. His father appears to have been a very wealthy man, and brought his son to Paris, for the purpose of superintending his education, but died white he was still a child. In his youth, D'Holbach appears to have been noted for his studious habits and retentive faculties, and ultimately attained to some eminence in chemistry and mineralogy. He married when very young, and he had not been married one year when his wife died. He afterwards obtained a dispensation from the Pope, and married his deceased wife's sister, by whom he had four children, two sons and two daughters. D'Holbach appeared to have spent the greater part of his life in Paris, and for forty years he assembled around his table, every Sunday, the _elite_ of the literary world, including nearly the whole of those who took part in the first Encyclopedia. If that table were only in the hands of some of our spirit friends of the present day, what brilliant anecdotes might it not rap out--the sparkling wit of Diderot, the good humor of out host, the hospitable and generous D'Holbach, the occasional bitterness of Jean Jacques Rousseau, the cautious expression of opinion by D'Alembert, the agreeable variety of Montesquieu, and the bold enthusiasm of the youthful but hardworking Naigeon! If ever a table were inclined to turn, this table should have been; but perhaps it may be that tables never turn when reason is the ruler of those who sit around.