“From the few observations which I have been enabled to make respecting the causes of fever during the two months which I have held the situation of house surgeon to the Dispensary, I am inclined to consider the filthy condition of the town as being the most prominent source. Many of the streets are unpaved and almost covered with stagnant water, which lodges in numerous large holes which exist upon their surface, and into which the inhabitants throw all kinds of rejected animal and vegetable matters, which then undergo decay and emit the most poisonous exhalations. These matters are often allowed, from the filthy habits of the inhabitants of these districts, many of whom, especially the poor Irish, are utterly regardless both of personal and domestic cleanliness, to accumulate to an immense extent, and thus become prolific sources of malaria, rendering the atmosphere an active poison. The streets which particularly exhibit this condition are Ashton-street, Hanover-street, Stuart-street, John-street, Lord-street, Duke-street, Princess-street, and the short streets leading from Queen-street, into Faggy-lane and Princess-street. It may be also mentioned, that in many of these streets there are no privies, or, if there are, they are in so filthy a condition as to be absolutely useless; the absence of these must, necessarily, increase the quantity of filth, and thus materially add to the extent of the nuisance. “In addition to the streets above mentioned, there are, besides, two other localities, which must be considered as peculiarly fitted for the generation of malaria—I mean the waste land in front of Bradshaw Gate, and also that situated between Greenough’s-row and Kerfoot’s-row; the latter is one complete pool of stagnant water, mixed with various descriptions of putrifying animal and vegetable matters. Many of the yards and courts in various parts of the town are so built up as to prevent the movements of the atmosphere, and are in a horribly filthy state, in consequence of dunghills which are situated therein being allowed to grow to an immense size, and the water which drains therefrom being permitted to flow over the surface.” Proceeding northwards, little difference is observable in the condition of the working classes in the ancient towns, where the habitations were crowded for the sake of fortification, and in the manufacturing towns, where the habitations are crowded for the sake of vicinity to the places of work, or from ignorance and inattention, or from the high price of land. We cite the following instances of the condition of the habitations and population in Durham, Barnard Castle, and Carlisle:— _Mr. Nicholas Oliver_, Durham, states that—