Whether it really comes from Siberia, God only knows.

So soon as it breaks out the horses die by dozens, and sometimes men and women are attacked, though it is not properly a human disease.

They say that flies carry the poison from the dead horses to the people.

The sign of it is a thing like a boil, with a dark-coloured rim.

If this is cut open in time the person may recover, but if it is not, the person dies.