A few years after the first three books of the Odes, Horace published the first book of the Epistles. Bentley assigns the appearance of these finished and elaborate compositions to B. C. 19, Clinton to B. C. 20. The _Carmen Seculare_, which appeared B. C. 17, on the occasion of the celebration of the Secular Games, and the fourth book of the Odes, which was published B. C. 13, were written at the personal request of the Emperor. He wished him to celebrate the victories gained over Vindelici by his step-sons, Tiberius and Drusus. His compliance with the wishes of Augustus was a graceful return for the regard and affection which the letters of the Emperor show that he felt for the poet.[643] The warm admiration which, these odes express, the praises which are lavished in them, upon Augustus and his step-sons Tiberius and Drusus, may seem inconsistent with the poet’s former republicanism; but who could withstand the proffered friendship, the winning courtesy, the good-tempered condescension of his patron? Besides, the experience of the past years must have forced him conscientiously to believe that the reign of Augustus was indeed a blessing to his country, and that his countrymen were totally unfit for real liberty, as they showed themselves quite content with the empty shadow of the constitution. He felt peace and repose were to be purchased by almost any sacrifice except that of honourable principle; that not only all the enjoyments of life were secured to himself to an extent equalling, if not surpassing, the wishes of his contented spirit, but that a similar measure of happiness was pretty generally diffused. He could not sympathize with political ambition, which had been the fruitful source of civil anarchy, and it was only the ambitious who had any cause to be dissatisfied. Doubtless the older he grew the stronger was the obligation which he felt to him who, by the lofty position which he had attained, had apparently prevented even the possibility of revolution or change. It is certain that the second book of the Epistles, and that addressed to the Pisos, which is commonly called the Art of Poetry, were written and published during the last years of his life; but the date cannot be exactly determined. He had long bid adieu to the excitements of politics; nor do these, his latest works, exhibit traces of his fondness for discussing questions of moral science, or for the profounder speculations of natural philosophy. He limits himself to the neutral ground of literature; and writes only as a writer whose judgment would be undisputed, because his works in their several departments had actually formed the taste of his contemporaries. In November, B. C. 8, A. U. C. 746, Horace was seized with a sudden attack of illness, and died in the fifty-seventh year of his age. His old friend Mæcenas had expired but a few months before. They were buried near one another on the slope of the Esquiline.