Thames Frost Fair 1683. Cold winters were more common during the Little Ice Age, but the Thames has been greatly narrowed since this period, speeding its flow and preventing ice from forming.
Major historical WTF ... This was in Popular Science Monthly circa 1923. Thanks to an English invention, babies are given fresh air in metal cages which are designed to attach to the outside windows of the building in which you live, with (only) the help of two iron poles. ~~~ Gee, wonder why this practice didn't keep? Yikes!