[…] opaque infra-red filters may be conveniently focused by pointing at a bright sun when using them for infinity shots.

But somehow the word got around in pigeon circles that Benchley was antipigeon. They began pestering me.

The next year, I sat in the Knothole section for the Northwestern game. Iowa won that day, too, 28–21. Within a few years, I went from kid-in-the-Knothole-section to photographer’s spotter on the sideline during Evashevski’s outstanding seasons.

Brill also considered three models of intervenability: at the patient, microsystem (patient-practice), and macrosystem (practice-system) levels.