Apology:

[In fact, the first edition of the Essays (Bordeaux, 1580) has very few quotations. These became more numerous in the edition of 1588; but the multitude of classical texts which at times encumber Montaigne’s text, only dates from the posthumous edition of 1595] he had made these collections in the four last years of his life, as an amusement of his “idleness.”—Le Clerc. They grow, however, more sparing in the Third Book.