Many are Called

An interesting covert street photography exhibit of pictures taken on the New York subway in 1938, 1940, and 1941.
Nowadays, with our smartphones and small high-ISO P&S cameras, taking such photos is not much of a technical challenge. It's easy to overlook just how hard this was to do with a 35mm Contax beneath one's winter coat with a bulb release routed down the sleeve. But the pictures are a remarkable time capsule of some of life's unguarded, boring moments. Ordinary then. Gone now. Brutally forgotten otherwise.