Of the value of such thorough inspection in the suppression of epidemics, and in the prevention of disease, there are abundant examples. The people of a populous town of England, becoming alarmed at the approach of cholera in 1849, organized a corps of inspectors, whose duty it was to visit from house to house, and inquire for cases of premonitory diarrhoea, and when found to apply the remedy at once. The result was that cholera did not visit that town. The same systematic house-to-house visitation was adopted in some poor districts of London in 1854, and there was an almost complete exemption of those parts of the city, while some quarters of the wealthy, which were not under such surveillance, suffered severely. [Sidenote: Inspection Must Be Thorough] But it is essential that this inspection should be by thoroughly qualified medical men, and it must consist in a house-to-house visitation. Disease must be sought for, found, its incipient history completely made out, the causes upon which it depends reported, and its remedy suggested. Every case of death should be visited, and all the circumstances attending the development of the disease, if it belong to the preventable class, should be rigidly investigated and reported, in order that the central bureau may apply the proper remedy. [Illustration: FEVER-BREEDING STAGNANT WATER, EIGHTH AVENUE, BETWEEN 75TH AND 76TH STREETS, 1865] Striking examples of the value of medical sanitary inspection are furnished by this voluntary organization. One inspector found diarrhoeal affections very prevalent in a settlement in an up-town ward, and for a long time was baffled in his efforts to discover the cause. He was finally led to examine the water of a neighboring well, which the people used. This water appeared to be of an excellent quality, but on examination by Prof. Draper, it was found to contain a large amount of organic matter, derived either from a sewer or privy. Prof. Draper pronounced it liquid poison. The mystery was at once solved, and the proper remedy suggested. In another instance a very contagious disease was found in a tenant-house, and after a long course of inquiry it was at length discovered that a washer-woman, living in the basement, had taken in sailors’ clothing. The sailors were found, the ship visited from which they came, and there the disease was found. None but medical men can prosecute such investigations with success, or suggest the proper remedy. If such a corps of sanitary inspectors were daily patrolling their districts, visiting from house to house, searching out sanitary evils, advising and aiding the people in the adoption of preventive measures, no epidemics of smallpox, typhus, scarlet fever, or cholera would ever gain more than a transient foothold. The sanitary inspector would truly become an officer of health and would be everywhere welcome. [Sidenote: The Remedy]