An Inside Frost (rondeau) or In Praise of Storm Windows

An inside frost, a common sight;
until this year, in bed at night,
I 'd feel the rime coating like mould
the sashes in the freezing cold,
and wake to find, in morning light,
interior glass with ferns bedight,
Despite the heating and despite
the wooden shutters, sagging, old,
an inside frost.

But this year cold has taken fright
and even when the moon shines bright,
the air behind the shutters' fold
upon the glass does not make bold
and curious imprints which delight -
an inside frost.