Well, here's what yesterday's Bald-faced Hornet produced today. Two cells, and the start of the paper covering. It gives an idea of how industrious these creatures are. I felt it would be unfair to let her continue striving to the point of complete enclosure, egg-laying and so on--and then knock the thing down.
So I scraped the incipient nest off with a hockey stick.
Sorry lady. Better luck elsewhere.