OK it's not exactly a lyric request .... more of a work request but I am appealing to all those poetic mudcatters and information workers out there... I have faith... mudcat hasn't let me down so far.

I'm looking for a poem about winter (don't know author or title) but it has the lines

"five barred fragility" and "sets flying fifteen rooks" in it.

My gut feeling is it's probably 20th century but I may be wrong. I also wondered if it's Sylvia Plath or Ted Hughes but can't find anything.

I'll earn lots of gold stars if I crack this one so thanks in advance everyone. I know someone out there will provide the answer

Sarah