Serious and immaculate, her haunting image is barely visible on tsarist-era Krasnoyarsk pictures, only spotted now, with new technology.
The best guess is that the mystery girl with the long plait is aged between 8 and 10, and she makes a - usually - 'bit part' appearance on photographs of buildings and sights in this historic city. In all, she appears in some 20 pictures and four glass negatives, which are kept in Krasnoyarsk Regional Museum of Local Lore.
Some were used for postcards of the city: yet over many decades no-one commented on the hardly visible well-dressed girl. So much so that for more than a century, her presence has gone unnoticed in photographs of Krasnoyarsk which were widely distributed as postcards and posters.
On a few shots, she is more evident, but is never quite the main focus of the photograph.