I remember frost on the inside of windows. Amazing the way it always made sort of art nouveau patterns.
Me too. My granny told me it was done by Jack Frost who had come round in the night. I
almost believed her. Among the various mysterious beings that grown-ups put on offer as explanations for external events - Father Christmas, God, Harold Macmillan, Jack Frost - he seemed by far the most plausible.
I'm still trying to work out just how the ice formed like that on the seats in MabelJane's picture. Amazing sight!