_Mr. John Rayner_, the medical officer of the Stockport union, states in his report on the condition of that town:— “There is a street of about 200 yards in length, the houses of which are of excellent construction, with very few exceptions, and without those unhealthy places, viz., cellar dwellings. The upper third of it is unpaved and without sewerage. It is 10 yards wide, and the inhabitants are generally very clean, as respects both their persons and dwellings; and notwithstanding they are, without exception, well fed and clad, fever has gradually prevailed, _but only on the north side_ of the street. The situation is not a confined one, neither do the houses differ either as to convenience or cleanliness on this side of it. “In the 10 houses at the upper end of this street (three of which are untenanted) there has been 21 cases of continued fever. Every house, with three exceptions, has had several cases, in some of them as many as four in number. In one, five cases have occurred. “Seeing this fact, I examined the adjoining yard and gardens, and found a stagnant pool of water and an open ditch about two feet wide, into which the refuse water from the houses, and from two pigsties, was allowed to accumulate. It is about 15 or 20 yards in length. Adjoining the gable end of one of the untenanted houses were found heaps of ordure and other refuse matters undergoing the process of decay. “The west end of this street opens into some gardens, where free ventilation may easily take place, and, I have no doubt, has prevented the spread of infection to the south side of it.” The following is the comparison of the different mortality in a drained and an undrained district, made by _Mr. Crowfoot_, surgeon, of Beccles, one of the most eminent of the medical practitioners in Suffolk. In a letter to Mr. Twisleton, the Assistant Commissioner, he states—