Ted Hughes- "You Hated Spain"

Hello everyone,

I've got work to do on Ted Hughes' "You Hated Spain" poem, and I'm afraid I didn't understand the message he wanted to get through, or the symbolic meaning of the piece.

I'd thus be very grateful if someone could explain the main ideas, the more important poetical devices, or just the signification of that poem. You can find the whole text on http://www.daveparker.com/?p=167 .

Thank you very much.