In a late number of the London Medical Repository, Dr. Carter, of Canterbury, gives the details of a case of secondary Small Pox occurring in a girl, which proved fatal. And a young lady (a family connection of my own), who had satisfactorily passed through the disease, from inoculation, when young, had a second attack of Small Pox, when on a visit at Liverpool, to which she very nearly fell a sacrifice. To this mass of evidence I shall add the case to which I have before alluded, as having come under my own notice. In this young woman the eruption was confined to the shoulders and face, and was not numerous, but it was preceded for several days by considerable feverishness and head-ache; and although it did not proceed beyond the fourth or fifth day, I consider the nature of the disorder as quite unequivocal; if what I conceive to be the only true test of this be admitted, namely, that it was produced by Small Pox infection, and was capable of communicating it to others. Fortunately this test was left incomplete in this instance, no other individuals having become infected in consequence; but the following facts which have since come to my knowledge, seem to warrant the inference, that this might have happened had any unprotected persons been allowed to have communication with the patient. A lady, residing at Gateshead, who passed through inoculated Small Pox many years ago, became lately (during her confinement) affected a second time with this disease. And notwithstanding that it was of the same mild character as in the last case, and that the eruption turned on the eighth day, her infant caught the infection. The eruption in the child was of the confluent kind, and occasioned its death eight days after the appearance of the disease.