I have a Windsor Hour.

If it creaks when you pedal sitting down, but not when you stand up, tighten the seat binder bolt-TIGHT.

If it creaks while pulling on the bars when dropping the hammer on weenies who paid too much for their bikes-try greasing the stem quill and tighten that mutha down-TIGHT

Make sure the pedals are on tight

My bottom bracket had a little port in the bottom and there was a gob of goo coming out, so I suspect it was/is greased down there.