It had been a close and sultry day - one of the hottest of the dog-days - even out in the open country, where the dusky green leaves had never stirred upon their stems since the sunrise, and where the birds had found themselves too languid for any songs beyond a faint chirp now and then. All day long the sun had shone down steadily upon the streets of London, with a fierce glare and glowing heat, until the barefooted children had felt the dusty pavement burn under their tread almost as painfully as the icy pavement had frozen their naked feet in the winter.