In 2004, a News photo intern in search of a lens spotted a cardboard box full of negatives marked, “Keep. Do Not Sell.” In all, Alexander Cohn found 5,000 images from 1950 to 1965 in the box. He examined 2,000 and estimated that most had not been published. “The editors thought if you didn’t publish it, much of this would go away,” says Ed Jones, 81, a photographer at The News from 1942 to 1987. “Associated Press kept on wanting pictures, and The News would be slow on letting them have them, so they flooded the town with photographers. The AP started sending pictures all over, and it mushroomed.” Many of the photos were published for the first time in a special section on Sunday.