In an earlier study of the plague in Colyton, Devon, the household distribution of deaths was studied to see whether this provided a method of identifying the causative disease. In this article, a known epidemic of plague in the Swedish parish of Bräkne‐Hoby was studied as a means of testing out the generality of the household distribution of deaths. It was discovered that, in this case, the very heavy mortality was due to two radically different means of spreading the disease, initially the classic bubonic one through the rat flea, and latterly, and somewhat surprisingly, the pneumonic one, through the infection of the inhabitants by their own friends and neighbours.