Eothen; Or, Traces of Travel Brought Home from the East

The two frontier towns are less than a cannon-shot distant, and yet their people hold no communion.  The Hungarian on the north, and the Turk and Servian on the southern side of the Save are as much asunder as though there were fifty broad provinces that lay in the path between them.  Of the men that bustled around me in the streets of Semlin there was not, perhaps, one who had ever gone down to look upon the stranger race dwelling under the walls of that opposite castle. 

It is the plague, and the dread of the plague, that divide the one people from the other.  All coming and going stands forbidden by the terrors of the yellow flag.  If you dare to break the laws of the quarantine, you will be tried with military haste; the court will scream out your sentence to you from a tribunal some fifty yards off; the priest, instead of gently whispering to you the sweet hopes of religion, will console you at duelling distance; and after that you will find yourself carefully shot, and carelessly buried in the ground of the lazaretto.