It was while he was most busily engaged in contributing to the _Standard_ his weekly poems, criticisms, and editorial articles, that Lowell wrote and published a group of books, varied in subject and treatment, dashed off each and all with an eager abandonment to the intellectual excitement which produced them, and read by a later generation as capital illustrations not only of their author’s spontaneity, but also of the permanent direction of his nature. It is not unfair to suppose that the steady application to work in connection with a cause which appealed to moral enthusiasm aroused in a mind like Lowell’s an exhilaration of temper very provocative of creation. The poems which he sent, one after the other, in a continuous flight, were witnesses to this activity of imagination, and the very tension of his mind kept him in a state of excitement, so that his diversions took the form of intellectual amusement. Two or three numbers of the “Biglow Papers” had appeared, when Lowell wrote his friend Briggs that he was at work on a satirical poem, but apparently he did not disclose its exact character, though he intimated at the beginning that he meant to give the poem to his friend. In point of fact, Lowell appears to have written at full speed five or six hundred lines of “A Fable for Critics” in October, 1847, and then to have been so busily engaged in getting ready his new volume of “Poems,” which appeared at the end of the year, that he laid it aside. “I have been waiting with a good deal of impatience,” Briggs writes, 7 November, 1847, “for the manuscript of the satirical poem which you promised to send me. As I have not seen anything advertised which sounds like you I am half afraid that you are not going to publish it. But you must be convinced from the great popularity that Hosea’s efforts have received that the sale of the poem will be large and profitable.”