(BBC News) In January 1913, a man whose passport bore the name Stavros Papadopoulos disembarked from the Krakow train at Vienna's North Terminal station.
Of dark complexion, he sported a large peasant's moustache and carried a very basic wooden suitcase.
"I was sitting at the table," wrote the man he had come to meet, years later, "when the door opened with a knock and an unknown man entered.
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"He was short... thin... his greyish-brown skin covered in pockmarks... I saw nothing in his eyes that resembled friendliness."
The writer of these lines was a dissident Russian intellectual, the editor of a radical newspaper called Pravda (Truth). His name was Leon Trotsky.
The man he described was not, in fact, Papadopoulos.