Surgeons’ Hall was pulled down in 1809, to make room for the new Sessions House. The doctors of the previous two centuries were mostly Sangrados, who bled and purged their patients most unmercifully; but we must say this to their credit, they did not descend to the sublime atrocity of microbes, bacilli, and all the other horrors of the microscopic mania now sending unnumbered nervous people into lunatic asylums. And so they had not, like their modern compeers, the chance of amusing themselves and paying one another professional compliments by sending glass tubes, filled with the deadly spawn, from one country to another by ship and rail. Fancy one of those tubes getting accidentally broken, or being intentionally smashed for a lark on board a passenger steamer. Why, this would speedily become a vessel laden with corpses! At least, according to modern teaching, which, _entre nous_, we have no more faith in than we have in many other medical dicta. A man is ill from over gorging or drinking, a child ails from a surfeit of sweets or from catching a disease playing with other children in the streets or at school. The doctor is called in, and instead of telling the man, ’You have made a beast of yourself,’ or correctly indicating the cause of the child’s illness, he sniffs about and says: ’There is something the matter with your drains: I can smell sewer-gas.’ And presently the sanitary inspector arrives, and orders the pulling up and renewal of the drains, and for days the house is filled with the effluvia supposed to be poisonous. How is it the whole family do not die off? Well, scavengers who daily deal with offal and garbage of the most offensive kind, the men who work down in the sewers, enjoy robust health; the latter only suffer when they are suddenly plunged into an excess of sewer-gas, but it is the quantity and not the quality that injures.