1. You can see the trapezoids are a little challenging there.

2. There are various trapezoids and spirals and other glyphs that are so large that the surveyors would need some direction from the sky.

3. A Red Admirable butterfly flutters round Shade moments before his death; a green ephemeral trichopteron describes trapezoids over Pnin's bald head at the very end of the synoptic chapters of the book; a hawkmoth convoys Krug out of the novel: "And as Olga's soul, emblemized already in an earlier chapter [Nine], Bombinates in the damp dark at