Mysterious London

A few days before I had to go, I accidentally went into one store of utensils. I did not see anything special there, but I really liked the wine glasses. There were three of them, not a pair number, I thought, probably, that's why they were not bought. And I decided to buy them, they were very tender and beautiful, I would say, even pretty, as it turned out at the checkout, they also went and at a discount. Bringing them home, I immediately identified them in the cupboard. Falling asleep late at night and plunging into a sweet dream, I suddenly heard a sound, a musical sound, very clean and pleasant and quite loud. At first I could not understand what it could be, then...