neat-rubbed
Dunno, Mav; could well be. Wotton was a friend of John Donne. You know what that crowd was like when it came to clever allusions. What I really wonder is what should be read into Joan's stroking a syllabub (or twain), especially when this comes in the line after a mention of a sturdy foot-ball swain?! (Sounds like they had soccer groupies in those days too.)
I wish someone who has the OED would take a look at "syllabub"; my dictionary has only a culinary definition.