"Truth forever on the scaffold, Wrong forever on the throne,-- Yet that scaffold sways the future, and, behind the dim unknown, Standeth God within the shadow, keeping watch above his own." Lowell's twenty-ninth year, 1848, is called his _annus mirabilis_, the wonderful year of his life. He had published small volumes of poems in 1840, 1843, and 1847, but in 1848 there appeared three of his most famous works,--_The Biglow Papers, First Series_, _A Fable for Critics_, and _The Vision of Sir Launfal._ As Mrs. Lowell's health was delicate, Lowell took her abroad, in 1851, for a year's stay. Thackeray came over on the same ship with them, on their return in 1852, and proved a genial companion. The next year Mrs. Lowell died. When he thought of the inspiration which she had given him and of the thirteen years of her companionship, he said, "It is a million times better to have had her and lost her, than to have had and kept any other woman I ever saw." [Illustration: MRS. MARIA WHITE LOWELL] LATER WORK.--After his great bereavement in 1853, Lowell became one of America's greatest prose writers. In 1855 he was appointed Longfellow's successor in the Harvard professorship of modern languages and polite literature, a position which he held, with the exception of two years spent in European travel, until 1877. The duties of his chair called for wide reading and frequent lecturing, and he turned much of his attention toward writing critical essays. The routine work of his professorship often grew irksome and the "Spence negligence" was sometimes in evidence in his failure to meet his classes. As a teacher, he was, however, frequently very stimulating. He was the editor of the _Atlantic Monthly_, from its beginning in 1857 until 1861. All of the second series of the _Biglow Papers_ appeared in this magazine. From 1864 to 1872 he was one of the editors of the North American Review. In 1877 he became the minister of the United States to Spain. The Spanish welcomed him to the post that Washington Irving had once filled. In 1880 Lowell was transferred to England, where he represented his country until 1885. No other American minister has ever proved a greater success in England. He was respected for his literary attainments and for his ability as a speaker. He had the reputation of being one of the very best speakers in the Kingdom, and he was in much demand to speak at banquets and on special occasions. Many of his articles and speeches were on political subjects, the greatest of these being his address on _Democracy_, at Birmingham, in 1884. Although his later years showed his great achievements in prose, he did not cease to produce poetry. The second series of the _Biglow Papers_ was written during the Civil War. His _Ode Recited at the Harvard Commemoration_ in 1865, in honor of those who fell in freeing the slave, "Who in warm life-blood wrote their nobler verse,"