21a "Dusk winding stairs, dim galleries got past"

I looked this one up--not now, but several months ago when leafing through books at Border's. I looked at the poems on this page and guessed, then flipped through to see if I was right. (I was.) It is Robert Browning. Rhymed couplets, but with the wondeful feel of blank verse because of the enjambments. A

21b "Thought clambers up"

This is from "Paterson." It is not WCW at his best. A-