A short young man, frowning, meticulously wiped the dust from the high bookshelves that he could reach - with a long, fluffy brush on a telescopic handle that resembled a shaggy stick for hunting cobwebs. He moved with an almost heroic look, as if he were fighting with ancient deposits of dust, carefully sweeping it from every corner. In every movement there was persistence and slight tension - as if this was not a simple cleaning, but an important mission on which the harmony of the surrounding space depended.