1. That this contagious disorder was propagated by touching the sick or dead bodies; by handling infected goods, such as clothes, furniture, and the like; by the patient's breath; or by the air of a room, confined and loaded with effluvia from the bodies of the sick; but not at all by the common atmosphere[58]. Hence those who avoid all communication with the sick, and never meddle with infected things, remain free from the plague, although they live in the same territory or in the same town where it is making its ravages; whilst the poor, not shunning communication with the sick, and putting on infected clothes, which they buy cheap or get by inheritance, are continually exposed to the contagion, and are consequently those who are chiefly attacked by the plague[59]. Now, if the cause of the plague existed in the atmosphere, or that it was carried by it in a state of activity from one place to another, it should follow, that all the inhabitants of the same territory, or at least of the same town, rich as well as poor, should be equally attacked by it; but this is not the case. All, therefore, that can be attributed to the atmosphere, with regard to the plague, is, that according to its different temperature, it disposes the human body more or less to receive the contagion; and that according as its temperature is greater or less, it renders the pestilential miasm more or less violent, or even destroys it; which, indeed, seems to have been the opinion of other writers on this subject[60]. We have seen in the preceding narrative, that the cold of winter blunted, and as it were froze the pestilential virus, whilst the heat of summer rendered it more active and volatile; nevertheless, at both these seasons, the atmosphere was as healthy as usual. 2. That it was sometimes difficult to ascertain the existence of the plague on its first appearance; but that afterwards it was attended by certain marks, which distinguish it from every other disease. These characteristic marks are petechiæ, buboes, and carbuncles. When these occur in a disorder which is very rapid in its progress, is accompanied with fever (unless when it destroys suddenly) and is highly contagious, there can be no doubt that such a disorder is the plague[61].