Lowell was now living in happy content at Elmwood. His father, whom he once speaks of as a "Dr. Primrose in the comparative degree," had lost a large portion of his property, and literary journals in those days sent very small checks to young authors. So humble frugality was an attendant upon the high thinking of the poet couple, but this did not matter, since the richest objects of their ideal world could be had without price. But clouds suddenly gathered over their beautiful lives. Four children were born, three of whom died in infancy. Lowell's deep and lasting grief for his first-born is tenderly recorded in the poems _She Came and Went_ and the _First Snow-Fall_. The volume of poems published in 1848 was "reverently dedicated" to the memory of "our little Blanche," and in the introductory poem addressed "To M.W.L." he poured forth his sorrow like a libation of tears: "I thought our love at fall, but I did err; Joy's wreath drooped o'er mine eyes: I could not see That sorrow in our happy world must be Love's deepest spokesman and interpreter." The year 1851-52 was spent abroad for the benefit of Mrs. Lowell's health, which was now precarious. At Rome their little son Walter died, and one year after their return to Elmwood sorrow's crown of sorrow came to the poet in the death of Mrs. Lowell, October, 1853. For years after the dear old home was to him _The Dead House_, as he wrote of it: "For it died that autumn morning When she, its soul, was borne To lie all dark on the hillside That looks over woodland and corn." Before 1854 Lowell's literary success had been won mainly in verse. With the appearance in the magazines of _A Moosehead Journal_, _Fireside Travels_, and _Leaves from My Italian Journal_ his success as a prose essayist began. Henceforth, and against his will, his prose was a stronger literary force than his poetry. He now gave a course of lectures on the English poets at the Lowell Institute, and during the progress of these lectures he received notice of his appointment to succeed Longfellow in the professorship of the French and Spanish languages and Belles-Lettres in Harvard College. A year was spent in Europe in preparation for his new work, and during the next twenty years he faithfully performed the duties of the professorship, pouring forth the ripening fruits of his varied studies in lectures such as it is not often the privilege of college students to hear. That pulling in the yoke of this steady occupation was sometimes galling is shown in his private letters. To W.D. Howells he wrote regretfully of the time and energy given to teaching, and of his conviction that he would have been a better poet if he "had not estranged the muse by donning a professor's gown." But a good teacher always bears in his left hand the lamp of sacrifice.