We now take leave of Dr. Johnson, as an author. Four volumes of his Lives of the Poets were published in 1778, and the work was completed in 1781. Should biography fall again into disuse, there will not always be a Johnson to look back through a century, and give a body of critical and moral instruction. In April, 1781, he lost his friend Mr. Thrale. His own words, in his diary, will best tell that melancholy event. "On Wednesday, the 11th of April, was buried my dear friend Mr. Thrale, who died on Wednesday, the 4th, and with him were buried many of my hopes and pleasures. About five, I think, on Wednesday morning, he expired. I felt almost the last flutter of his pulse, and looked, for the last time, upon the face, that, for fifteen years before, had never been turned upon me but with respect and benignity. Farewell: may God, that delighteth in mercy, have had mercy on thee! I had constantly prayed for him before his death. The decease of him, from whose friendship I had obtained many opportunities of amusement, and to whom I turned my thoughts, as to a refuge from misfortunes, has left me heavy. But my business is with myself."--From the close of his last work, the malady that persecuted him through life came upon him with alarming severity, and his constitution declined apace. In 1782, his old friend, Levet, expired, without warning and without a groan. Events like these reminded Johnson of his own mortality. He continued his visits to Mrs. Thrale, at Streatham, to the 7th day of October, 1782, when, having first composed a prayer for the happiness of a family, with whom he had, for many years, enjoyed the pleasures and comforts of life, he removed to his own house in town. He says he was up early in the morning, and read fortuitously in the Gospel, "which was his parting use of the library." The merit of the family is manifested by the sense he had of it, and we see his heart overflowing with gratitude. He leaves the place with regret, and "casts a lingering look behind."