Yesterday’s Kasia Cieplak-Mayr von Baldegg posted a short reel of “process plate” rear-projection footage of downtown Los Angeles, shot sometime around ’48 or ’49, I’m guessing. “If it was ever used, it was seen fuzzy and out of focus,” she wrote. “Today, however, it’s amazing documentation of a lost neighborhood.

“Watch the signs, the spectators and passersby, and the streetscapes, and marvel how historical images can carry evidentiary value that no one ever imagined they would.”