Practice, indeed, came upon Dr. Gull all too soon for medical science to reap the highest advantage from his original research. But whatever he has written has been of high value and worthy of deep consideration. Among his writings may be mentioned the Gulstonian Lectures on Paralysis (_Medical Gazette_, 1849), essays on Hypochondriasis and Abscess of the Brain, in Reynolds’ “System of Medicine,” and Guy’s Hospital Reports, 1857; on Paraplegia, in Guy’s Hospital Reports for 1856, 1858, and 1861; on Anorexia Nervosa, and on a Cretinoid State, in the _Transactions of the Clinical Society_, vol. vii. His Report on Cholera, with Dr. Baly, for the College of Physicians (1854), and his paper, with Dr. Sutton, on Arterio-Capillary Fibrosis (_Med. Chir. Transactions_, vol. lv.), rank high as original contributions, which must always be consulted by writers on those subjects. In an oration delivered before the Hunterian Society in 1861 Dr. Gull took occasion to utter a protest against the popular prejudice for specialists. “Who can treat as a speciality,” he asks, “the derangements and diseases of the stomach, whilst its relations and sympathies are so universal? How can there be a special ‘brain doctor,’ whilst the functions of the brain are so dependent upon parts the most distant, and influences the most various? A tumour in the brain may tell of its presence only through disturbance in the stomach, and a disorder of the stomach and its appendages may have for its most prominent symptoms only various disturbances of the brain.” In his address on “Clinical Observation in Relation to Medicine,” before the British Medical Association in 1868, Dr. Gull thus expressed his impartial attitude in medicine: “We have no system to satisfy; no dogmatic opinions to enforce. We have no ignorance to cloak, for we confess it.” “Medicine is a specialism; but of no narrow kind. We have to dissect nature; which, for practice, is better than to abstract it.” “To clinical medicine the body becomes a pathological museum. In every part we recognise certain proclivities to morbid action; and the purpose of our study is to trace these tendencies to their source on the one hand, and to their effects on the other.” “The effects of disease may be for a third or fourth generation, but the laws of health are for a thousand.” “Happily, at this day, hygiene has gained strength enough to maintain an independent position in science. To know and counteract the causes of disease before they become effective is evidently the triumph of our art; but it will be long before mankind will be wise enough to accept the aid we could give them in this direction. Ignorance of the laws of health, and intemperance of all kinds, are too powerful for us. Still we shall continue to wage an undying crusade; and truly we may congratulate ourselves that no crusade ever called forth more able and devoted warriors than are thus engaged.”