In 1818 Hall published a work on the affections usually denominated Bilious, Nervous, &c., and in 1820 an essay in which the prevalent custom of bleeding was attacked, especially in certain affections occurring after childbirth, which under that treatment almost invariably proved fatal. In 1822 this was followed by a small volume on the Symptoms and History of Diseases, which was especially valuable in treating of the detection of internal diseases. In 1824 appeared his important paper On the Effects of the Loss of Blood in the “Medico-Chirurgical Transactions,” published also in an expanded form in his “Medical Essays” in the same year. Before this time the lancet was in hourly use, and Marshall Hall termed it “a minute instrument of mighty mischief.” Almost all pain in any complaint, quickness of pulse, headache, intolerance of light or noise, being believed to arise from inflammation, blood flowed in torrents to subdue it. It was by his various papers bearing on this question that Dr. Hall became prominently known; for the dropping of the lancet was an evident change of procedure which the public as well as the profession could lay hold of. In 1825 the young enemy of the lancet was elected Physician to the Nottingham Hospital by a large majority of votes, and the best practice of the neighbouring counties was his. He was unremittingly employed: in his walks and rides almost heedless of external occurrences, absorbed in contemplation; at home ever busy in his library or his laboratory, making chemical experiments from which numerous valuable memoirs arose; never accepting invitations of pleasure; unwearied in his attentions to the sick poor whom he saw gratuitously. He economised time by riding, being a good horseman, riding through the country on pitch-dark nights without accidents. He treated his horses well and earned their affection. “How is it that your horses never fall?” a friend inquired. “I never give them time to fall,” was the reply. The Bible constantly at his side was another mark of Marshall Hall, and he was ever ready to discourse on the wisdom and benevolence of God, as shown in the structure of the human body. London continued to attract the popular Nottingham physician. Dr. Baillie had predicted that if he came to London, he would be the leading physician in five years; Sir Henry Halford, who succeeded him as President of the College of Physicians, termed Marshall Hall, a few years afterwards, “the rising sun of the profession.” We cannot wonder that a visit to London in August 1826 resulted in his remaining there. His Nottingham patients, deeply regretting his removal, continued to consult him by letter; and his first year in town produced £800, a remarkable instance of quick success.