The proximate cause of the exceedingly fatal character of the disease at this seaport is probably to be found in the effluvia engendered by the extensive tract of marshy land, called the "Cloffocks," adjoining the river Derwent, and in the immediate vicinity of the town. What is most remarkable, the first case of cholera at Workington occurred on the same day of the same month, in the same house, and even in the same room in the said house, where the epidemic first broke out in the summer of 1832. There is no peculiarity in the situation of the house, nor can any reason be assigned for this most singular coincidence. I am informed that very few insects were seen about the river, and, during the height of the disease, the rooks entirely forsook their old-established quarters in the grounds adjoining the Hall.[29] Footnote 29: The cause of this fearful epidemic is still a mystery. The meteorological conditions of the atmosphere, although slightly abnormal, are wholly inadequate to account for its induction. It is most probably induced by some gaseous poison diffused through the atmosphere, but of a nature so subtle that the most delicate analysis fails to detect its presence. According to the experiments of Dr Dundas Thompson of Glasgow, no solid matter existed in the air, but ammonia was obtained from it in the proportion of 0·319 grain of caustic ammonia, or 0·731 grain of carbonate of ammonia, to 1000 pounds of air. _October._--Cold, with an average fall of rain (5¼ inches.) The mean temperature is 2°·5 _below_ the average. The grain crops were above an average in point of quantity, and they were got under cover in excellent condition. Garden fruit, as pears, apples, &c., were not so plentiful as usual. On the evening of the 28th, that rare phenomenon a lunar rainbow, was seen from the grounds at Tarn Bank, near Cockermouth, by Isaac Fletcher, Esq., to whom I am indebted for the following description of it:--